I had a similar reaction for having a purchasable lightsaber, but I guess it makes sense.
There are lots more lightsabers in the universe than Jedi at this point. Also doesn't make a lot of sense that Diala doesn't have one, Jedi can make them, hell even Ezra made his own gunsword.
As for anyone else wielding it... Well I guess it might be good on Loku, and considering he's easily the worst character that isn't a bad thing. Anyone else isn't going to want it.
You seem to assume that one gets up one day, realizes they can do Force stuff, and poof, they become a member of the Jedi Order and get instinctive knowledge about building what we are told is one of the most sophisticated weapons in the galaxy and proceed to do so with parts from an old refrigerator. "The Force doesn't work like that!"
So, what you're saying is you haven't seen The Force Awakens. Because that is pretty much the plot. Woman has the force, gets drawn to a light saber, outshoots a bunch of elite storm troopers despite never having fired a gun, masters multiple advanced force techniques the first time she tries despite knowing nothing of the force, overpowers a highly trained Sith and beats him up with the light saber she's never had any training for.
Welcome to the new and "improved" Star Wars.
So, what you are saying is you did not understand The Force Awakens.
First of all, Kylo Ren is neither a Sith, nor highly trained. He's a kid that has some inherent potential, got some basic instruction and wound up with delusions of grandeur. He is in fact called out in the movie on not finishing his training. He has had barely any lightsaber practice, as evidenced by his fighting "style" in the duel you are referring to. He was wildly swinging his Satan laser sword like a baseball bat. None of the three people involved in that duel had any experience with lightsaber fencing and therefore had pretty equal chances, and you could see that in the way they moved. Which is what makes that scene great. This is not the finesse jump around space ninja prequel stuff. This is a bunch of untrained angry people in a brutal brawl that happens to involve lazor swords, because that's what they had on hand.
Other than that, everything that happens with Rey makes complete sense if you make the effort to think about it. It's in the title. Up to this point, in all the previous movies, we saw people learning to use the Force as a skill. It was almost like a science, a physical action and reaction thing that, if you had the necessary prerequisite, simply required practice. I do this and that, the thing moves through the air, that's how it works.
Remember when Obi-Wan was first telling Luke about the Force in ANH? The Force is what gives a Jedi his power. It's an energy field created by all living things. It surrounds us and penetrates us. It binds the galaxy together. It's an energy field, it can be manipulated. You manipulate it, and you do the stuff, and that's that.
But then Luke asks: You mean it controls your actions?
And Kenobi responds: Partially. But it also obeys your commands.
The Force obeys the commands of its user. By using the Force, you bend the energy field to your will. But it also influences your actions partially. Not by much. Why not by much? Because it slumbers.
Fast forward 34 years into the future and Supreme Leader Snoke states: There's been an awakening. Have you felt it? It's a tiny line that's deliberately hidden in the dialogue to make you assume he means that Rey has "awoken" into being a Force-sensitive. But that's not what he means. He means the Force itself. It has awoken and became a living, sentient being, a higher power in the universe that can exert its influence on the material world. It's what people in the middle ages called "Providence". "The Force Awakens" isn't a catchy metaphor of a title. It's literal. It's what happens, turning the entire cosmology of Star Wars universe on its head. The rules of "using the Force" have changed. The proportions in the push-and-pull between the Force and Force User changed. It now controls your actions to larger extent than just "partially".
Rey does not use the Force do all the things you listed. The Force itself does it through her, because it's necessary for some grander purpose we do not know yet,
Remember when the lightsaber lands in the snow during the duel at the end? Kylo Ren tries to use the Force to pick it up. But he can't. And he's visibly shocked by that fact. Because he should just telekinesis that thing right up to his hand. That's how it's always worked. You do a specific action, and the reaction is the object flying into your hand. No ifs or buts. But it no longer works that way. The Force itself has decided that he is not fit for that to happen. The Force makes a conscious decision to choose Rey, and the lightsaber flies into her hand. And she's just as visibly shocked by that as Kylo Ren. You can see it on her face. She didn't expect that to happen, because she's not the one doing it.
Anyway, rant over, I'm spent for the night. TL;DR: In Soviet Russia, Force uses you.
Edited by Don_Silvarro