I do care when it's a playstyle that is trying to make a game conform to those standards. So far, it seems to be a style that actively is hostile to anyone who doesn't adhere to your "optimization or get lost" attitude.
I don't see anyone making any playstyle trying to conform to any standards.
Most of these issues can be fixed by just talking to the person and point out that doing X gives Y benefit, people generally want to be good at their job, or in this case an good adventurer. Those that don't make little sense to me, but even when dealing with them it comes down to in character conversations of why are we traveling with and entrusting our lives with someone who refuses to do something as simple as wear good armor.
There is more to the studded leather story I will go into that in a bit.
But no one is saying get lost, they are saying "Why do you choose to suck?" It is like in an MMO where people would show up to end game raids wearing PvP gear instead of PVE gear. Why? just do what you are supposed to do.
This seems odd to me, but I suppose it just depends on whether you see the game as a group storytelling venture, or an our team vs their team sporting event.
However, getting upset at someone else for they way they play the game is not cool.
It is a group storytelling venture, but it has consequences if you fail, events change, characters die, and so forth. D&D isn't PvP but it is PVE, the characters go against the antagonists of the story and if they fail a character could be killed off and that sorta sucks. So do what you can to prevent that is all I am saying.
I get upset when people preach that wearing subpar armor or using inferior weapons make them a better roleplayer, trust me it doesn't.
Now the full studded leather story.
Character was a rogue, had more than enough gold to purschase studded leather and his weapons because he didn't get a bow, but chose not to. I pointed this out before the game started and he didn't change, said he wanted to save his gold, OK. Then we play for a bit, after a couple game sessions including one combat where he went down at a crucial point and wouldn't have if he was wearing studded leather, my character offers to purchase the armor for him. He refuses, he doesn't like the look of the armor, my character says he will pay extra gold to have the armor custom made to look like however he wants. The player then takes it out of character and tells me to stop trying to min/max his character and he wants to roleplay, I say my character has been doing everything in character he can to get him to switch all "roleplaying" and he says 1 point of AC doesn't matter, I point out it did in that one fight, he says something about "rollplaying" I decide at this point it's not worth the trouble and I am leaving the game, I burn my bridges and go off on the guy.
This guy thinks that wearing leather makes him a better roleplayer, for the record 95% of the time his character said nothing and just kinda was there that doesn't sound like much of a roleplayer to me.