Guild Wars 2

Is there established lore why clothing in Tyria is so human centric?

(I know the irl reason but just curious about in game)

Care to elaborate? Do you mean that the clothes look better on humans, or that the clothes look similar to what humans have worn in real life? Or something else?

All 5 races are humanoid to some degree or another, the charr probably the least so. So at least in how clothes hang on the body, they will all do so more or less the same, perhaps only varying on scale. I don’t know what all makes it “human-centric” except that there aren’t many vine-based clothing for sylvari, or magitech clothing for asura.

Charr have to deal with terrible clipping issues, graphics-wise (I believe Asura as well). Most of the armor sets in game are designed for humans, and look terrible and terribly out-of-place on Charr, or Asura, or even Sylvari when you consider their cultural backgrounds.
Basically almost any armor set could pass for “human cultural”, but considering their background and customs, the other races only get 3 “cultural” sets per armor type (maybe 4 if you count dungeon armors, such as TA for Sylvari, CoF for Charr, and CoE for Asura, but then humans get more with CM and AC).

As a Charr player, this is something I don’t like. My ferocious war-cat looks ridiculous in turtlenecked “swindler” coat and feathered pirate hat, but sometimes those are the drops I get while leveling.

I agree the Charr have more broken armour pieces than most, but that’s not to say you can’t work around it. Even my charr necro (Light armour is the trickiest to fit for charr) found gear that suited him by the time he hit level 80.