I see that too and I don't understand it. Those dresses are often very expensive, why the fuck would you let them get grimey?? I shutter to think they might try to sell those dresses second hand one day. I don't like the people who don't even try to look like they bathed or combed their hair. The backgrounds of their pics are also often super gross and cluttered, too.
I don't like using the term ita much, since it's often used by mean retards to refer to any girl or coord they don't personally like, but being a greasy troon or unkempt woman feels ita as fuck. It would be so uncomfortable to go out looking crazy like that and it's a huge disservice to yourself and others. There's a time and place in alt fashion for not caring what people think about you, and being an unwashed gigasperg isn't generally the point when anyone says that. Even if you don't care what normies think, you should at least care a little bit about what your own people do, otherwise why are you part of that fashion/subculture? People will tolerate spergs within reason, alt fashion is full of them, but practically nobody wants to associate with stinky spergs for very long.
I see people on the subreddit and fb groups often yasslight the frumpiest people. It's frustrating, because girls with genuinely cool or beautiful looking coords don't get nearly the engagement. And you can't criticize the stinky people, even gently and very constructively, or they'll cry about it.