Specifically, comments aimed at the support I've offered for my opinion.
Ok here is one:
An astral marketplace is *entirely* within the realms of reason.
>>
RAIDS
The central aspect of githyanki society was its culture of plunder. Their ultimate goal, under Vlaakith, was to treat all worlds of the Material Plane as the githyanki's gardens, which they could loot at will and bring the spoils to their home in the Astral Plane, where they would never have to worry about food, water, and other concerns that were considered to be beneath them.
Source:
https://forgottenrealms.fandom.com/wiki/GithyankiNow ... a question ...
Why would race that (CANONICALY) centralize their whole society around the idea that whatever they want, they simply take ... create marketplace to earn some kind of curency?

Because, RagnarokCzD, CANONICALY is in the box. You need to think OUTSIDE the box. Canon is dumb and boring. We don't want anything that is established. We want Larian to do whatever they feel like doing with the entire Forgotten Realms. Isn't that what we've been fighting for the entire time since the game's EA was first released? Haven't we been fighting so that Larian can do whatever they want and NOT hold true to canon or lore or rules of any kind? We don't want Larian to change anything... anything at all. The game is perfect as is. No more suggestions, people. NO more. Leave the game as is.
Gith don't act like Gith.
Vampires aren't vampires.
Harpies aren't harpies.
Intellect Devourers are dumb thug brain dogs that can't Devour Intellect.
Wood Woads don't act like Wood Woads
Mud Mephits don't act like Mud Mephits.
Goblins are not evil necessarily.
Minotaurs hulk smash
Duergar can shove you 60 feet into lava.
Ogres can throw goblins in barrels more than 100 feet through the air
Phase Spiders Super Misty Step up to thousands of feet and spit poison at you instead of Ethereal Jaunting and attacking at point blank.
So, you know what? The Gith not caring about you wearing another Gith's armor just goes right along with everything else that doesn't fit into canon Forgotten Realms.
And you people wonder why I get a bit passionate about why I want more D&D 5e rules and stats and such. It's because of this kind of thing. Once you start down the Dark Path, forever will it dominate your destiny. Consume you it will! Like it did Obi-wan's apprentice.
Once you start tossing out canon and lore, everything can go. So, which side are you on? Are you on the "I want more canon Forgotten Realms and therefore I want the gith to get upset if they see a non-gith wearing gith armor" or are you on the side of "I don't want canon and I want Larian to chuck whatever they want so the gith wouldn't give a flip about someone wearing their armor?"
And regardless of which side you are on, will it REALLY matter? Will Larian REALLY care, or are they going to do their own thing regardless?