Good point. The Marvel universe is all a bit ASCII shrug about aliens, gods, green monsters, massive disasters every few months etc all turning up at once, it’s just by the by. Everything is normal there.
The first couple of X-Men flicks did at least address the moral implications of being so different (like the Iceman and his parents bit in X2). But in the MCU, it’s hard to see mutants being anything but ‘yay new super-friends!!!’. If everyone’s cool with Thor, Hulk, Vision et al, then Jubilee or whoever isn’t gonna stand out and there’s no ‘point’ to them but fanservice.
What’s weird is the DC films at least address this - Batman being suspicious of the super-powered alien and trying to mitigate the effects of all this craziness. Not saying they did it well, but at least it’s there (haven’t seen it).