Suddenly realized that the X-Men are the real misfits of Marvel continuity because they’re people, not superheroes. A few web-crawlers, gamma irradiated monsters and superspies don’t completely rearrange the known world like mutants, who are as likely to become super-roofers, talk show hosts or automotive engineers who never really use their powers. And unlike the Inhumans, who largely do their own thing, the whole deal with X-Men is that mutants integrate.
As soon as you have Cyclops join the Avengers or whatever you start getting more into having to acknowledge sweeping societal change rather than just having mutation be another reason for awesome space or inter dimensional spandex adventures (which tbh I’m a big fan of, there’s a lot of need for big flashy escapism without needing to tackle deeper themes).
Also in the Marvel Universe eventually everyone winds up in the Avengers at some point. It’s like how everyone you meet has probably worked food services.