I think I get your point - sort of.
Well I'm still stuck with the basic version on 4.X because I have an older computer & you don't have UA folder/specific skins in that version. I have noticed that in the latest version you do have ukranian folders etc. probably skins as well. But since I'm with basic v4 I dont.. so I made a mod.
And this is a mod btw... I dont get your point of why its an issue of having a skin mod? This is what the mod folder is there for, its completely optional based on users taste.