Like, I’m probably answering myself here but I think it is pointed out by gatekeepers who can’t stand the idea of community growth and everything should adhere to some other unfound arbitrary way to keep things ‘pure’ in a community.
When they forget that they too, started out as new and that they too probably have had other people sneer at them for simply being new. So now they go around and pretend this is some kind of ultimate shut-down insult to people who’re just trying to contribute to the fediverse by devaluing it by saying “OH U JUST SOME DAY OLD ACCOUNT, NOBODY SHOULD MIND THEM!”.
It’s just a quick and dirty rule of thumb that works surprisingly often. If you meet a jedi from Tatooine, it’s a pretty safe to guess that they’re fed up with sand. Same sort of safe guess works with new accounts too.