@Derrault and whoever else.
There is the theory, then there is the practice. There's no way I can force anyone to do anything unless I'm the GM for a campaign. However, within our gaming group we all have a basic understanding of just sorta being cool about stuff. But aesthetics aren't purely optional, they're the reason this specific genre of games was invented. Aesthetics are why we aren't just playing with color coded wood blocks like in the pre-DnD days. Personally, if there were no miniatures, I would not be a gamer. In theory, I shoot for 100% painted, WYSIWYG, textured bases, paper flags added where needed, etc. Then life and compromises get in the way and I have to field some models with plain bases and pretend an ordinary knight is a character model or whatever. I shoot for an A+ so that I can be sure I'll get a B. Whereas if I shot lower, then after life got in the way, I'd find myself using grey armies and the game would have no purpose. Playing with grey and wildly proxied armies is like reading a script at home instead of watching a play in the theater. It's the same exact story, but chalking that up to "purely optional aesthetics" is a bit much.
The reality is there's all sorts of things that have to be hashed out between friendly opponents when you play across systems and decades. When I started, I gave my Leman Russ battle tanks some upgrades which became an inefficient use of points, or even illegal, in prior editions of 40k. Heck they weren't even all upgrades: side sponsons were the de facto law of the land in 2nd edition, and a really bad upgrade in 3rd edition. So I take my lumps and miss-spend a few points on side sponsons. It's not like my life savings is riding on the outcomes of these games. Much trickier was the tank where, I'd replaced ONE sponson bolter with a heavy flamer. In 2nd edition, that was legal and in fact kits only came with one heavy flamer part to use anyways. In 3rd edition onward, you either replace two or zero. So, I have to let my opponent know what that tank's load out actually is.
For the hero with the sword and pistol you asked about, yeah, they should take both. That might not work out though, if the options in the army list changed over time or whatever. Often times as our collections grow and we play across various systems and editions, every little detail like that can't be kept up with. But we try in our group to minimize such things. The time and effort that goes into painting the model is sort of taken as proof of good faith too, and we grandfather stuff in because the person's not trying to minmax, it's not their fault the rules changed out from under their models. Or sometimes someone will say something like "I just started this faction, if you really want to play with that many points, my landspeeder with heavy bolter will have to take an assault cannon instead." and we'd let that kind of thing slide. A frequent 40kism is, we'll allow power swords to become "regular" swords and vice versa if someone is having trouble rounding off the correct number of points.
What I don't like, is when compromising on aesthetics is used as a means to secure victory. There's always someone in the gaming group who tries to push the envelope on that. Sadly, the FLGS's (luckily with the exception of the SW: Legion store players I've found) grey vs. grey with a heavy dose of proxying is the norm. Like, the 99% norm. I have yet to encounter these mythical exclusionary clubs and stores that require painted armies. Only informal gaming groups of like minded people who all show up with painted stuff as a matter of course.
I also don't particularly care about official models. Like if we need a monster to show up and wreak havoc on both sides, well, why not use one of the really cool looking toy dragons or dinosaurs from Schliech or Papo? They're already painted, they're cheaper than a gaming mini, and they look good. EM4 will sell you something like 50 low grade, vaguely Warhammery styled, Orcs or Dwarves for like $10. If someone uses an army of those nobody in our group cares. It did start to get really confusing using them in Kings of War because no one rebased them, but that's another story*.
Then there's the cost issue. Sure we can't all afford the latest cheesy spam thing. But I put forth that the solution is, don't engage in a cheesy spam arms race. Lowering the bar just escalates the arms race. Once upon a time, spamming space marine drop pods was highly effective, and no other army had anything like them. But the pod models were expensive. So people made drop pods out of paper cups. There's nothing fun about a game with no spectacle and where rolling dice and moving is a formality because of how distorted the army lists have gotten. I think we're ceding too much of our own better judgement to games publishers, who are only human themselves.
If (a very big "if") valuing aesthetics and background is elitist , then I'd put forth that compromising aesthetics in miniature gaming in order to increase one's chances of winning then becomes entitled . Having the time etc. to play Legion and not being able to take 3x snipers or something is a pretty good example of 1st world problems.
*For those familiar with KoW . We had to bring in a 51% house rule because of the EM4 models. Ie, a unit had to be represented by at least 51% by headcount, in addition to having the correct footprint. Those EM4 orcs n' dwarves have molded-on bases which are kinda sorta close enough for lots of games. But they're rectangle not square, and slightly bigger than 20mm. Thus, only 8 of them fit onto a 20 man movement tray. So during games, you'd see two little rows of guys and instinctively think you were charging a Troop, find out it was a Regiment, and get a nasty surprise.
Edited by TauntaunScout