I have to ask why exactly do you have such a disdain for such an option. I get you listed your reasons but at the core it seems far deeper then what you have listed. Just seems more personal then anything.
Apparently they need to be validated in game and want people to wear what they want but then made a passing but very obvious statement about headscarfs as a negative.
So the person is a look at me person and vouches for choice yet when it comes to headscarfs its a no (to which was brought out of no where mind you), yeeeeeeeeeee this person should be ignored in game and irl.
Quite a few of the arguments against this option (or hell the DISCUSSION of the option itself) do seem to come from a place of being perturbed that someone somewhere might not see their character how they want them to, which seems like a pointless thing to get emotional about when mods and the game's own graphical settings exist. What if someone is playing with reshade or bad light settings and that makes their character look less than optimal on that person's screen? Do they break out in a cold sweat? What about lewd mods? You'd think with that visceral level of hatred for this idea that they'd never leave their inn room or something.
Yes I'm being a bit hyperbolic but that seems to be the flavor of disagreement folks are offering right now.
I can understand making your character look the way you want and that it is personal expression but I do that for me alone and not to impress people, especially in a multiplayer online game where you know someone may be seeing something different than you.
The jokester in me from earlier aside. Put the glam off option in. Then add a glam on option that when activated removes said player from a glam off players view and vice versa. Immersion is not ruined and people get seen how they want to be seen. If options are so good then both sides should get and option.
This works until you have to party with that player. I'd love to have people turn themselves off in the overworld from my view. That would be great.. but if I need to play an instance with them that option quickly becomes an actual hindrance. The logical extension of that being not to allow those two to party together... but that might increase queue times undesirably.
Again if BOTH sides are disabled you are defeating the purpose of the original feature. Do you understand that some people who want this feature want it working in dungeons and instances for the specific purpose of not having "weird" glamours in their cutscenes and battles?
I could live with a toggle that disables other player characters during cutscenes, and turns other peoples character while in a dungeon as their job icon. This would be much more difficult to implement.