Meetup got enshittified years ago already, and the changes drove away the small communities that once made up so much of the site; the only groups which prosper on it now are mainly large for-profit ventures.
In places where there is a healthy ecosystem of casual, non-rapacious meetups, that is overwhelmingly organized via Facebook, not Meetup.
Citation needed. Not my experience at all. And it has the major benefit of being independent of the tech giants, who already know too much about your social graph.
If they don't have your interests, feel free to start a new group?