>As for non-binary actors, why not just nominate them in the category that’s best fitting for the character they’re portraying?

that just delays the problems for the next generations to deal with when more roles feature characters who don't clearly fit in the box of 1 gender.

>I don’t see why we should change nearly a hundred years of an awards category just for rare fringe circumstances.

Because the cases will become less rare over time. Might be better to reform the system beforehand until waiting for the problem to spill over. An ounce of prevention is worth a pound of cure.