1.) I do not believe when people talk about "realism" they are refering to the fairly arcane and specific dogma of physicalism. I think that they mean is that things ought to conform to the PSR, (even though they probably don't know what the PSR is).Which is the point of view that the people bent on "realism" take. It's not mine, btw, just trying to explain it.
The problem is not that some people want to imagine a world in which physics are way more complicated because of magic, the problem is that they want to fit magic into the currently understood laws of physics, and it simply is incompatible, just as the black body problem was totally incompatible with newtonian physics until quanta were thought of.
2.) That is precisely my point, but you're phrasing it as a reply rather than affirmation of something I've already said.