Standards and practises shift from project to project. As we stand currently these "vibe-coders" are choking out a lot of FOSS projects while contributing fuck all. LLMs aren't intelligent, they're just token prediction engines, they'll never understand why something is done in a particular way, or how it works, because they cannot understand.
Can you produce something good with it? Yeah, sure, if you put a person in charge to vet all of that code, who fully understands the output and the implications. At that point however the person might as well just have written it themselves.
If you want to use LLMs for some goofy one-off project for yourself, then go nuts. Don't fucking spam others repositories with code you didn't bother writing, just for some clout or whatever.