By and large modern Mastodon / Fediverse *is* a welcoming and diverse place.
There have been historical issues with lack of timely moderation, ongoing issues about reply controls and a long standing problem that parts of Fediverse are run by edgelords that had already been yeeted from just about everywhere else (even corporate socials) and they actively try to disrupt things, but its endured this and even attracted interesting segments of folk such as older adults (age 60-70+) who are *not* all tech focused.
What is generally unpopular here is any kind of "hustle" or tech/AI bro culture (no matter who it is from), and those who push it too hard can end up being chased off to the sound of Yakety Sax 😁