As is often the case on the internet, there's a huge middle ground that's being completely avoided.
No one's saying you have to hold your opponent's hand and make every decision for them, let them take back action after action after action like they've got the friggin' sands of time on their side, and allow infinite rerolls until they succeed on every check. Likewise, however, no one's saying that healthy competition means competitively timed phases, merciless rules-lawyering, crushing your enemies, driving them from the asteroid field before you, and listening to the lamentations of their Twi'lek dancers.
It's somewhere in between.
If someone's having a crummy day, maybe you show a little extra patience. If someone's getting frustrated at unlucky die rolls and they get flustered, maybe gently remind 'em about a target lock or focus token they've got handy. If someone's new to the game -- or even just new to their fancy new list -- be patient if they forget stuff, and remember you were new to something, some time in your life, too.
Edited by Critias