I would guess mostly because python interpretes are just about everywhere.
Also the binaries compiled with nuitka end up being much bigger in size. A simple script of a few kb can and up in the hundreds of mb when you start compiling the dependencies, so it's not a perfect solution.
I never knew why people need to conflate the personality or political opinions of the artist with the art they make.
In my opinion, even if the artist is a terrible human being they can still produce some good art. And even if the art they produce is crap, it can still prove valuable, as it can be parodied, modified, transformed or mocked.