I think the "reducing to roles" thing is a bit silly. Some are into firemen but I feel like it'd be silly to run around calling that morally objectionable. I don't think anyone is under the impression a fireman, a teacher or a mom is literally just that role and nothing else.

I wonder if the race thing would be fine if it was towards the majority group of a country, since most of the objection from the paper seems to be about how it disadvantages people and enforces that disadvantage. That'd lead in funny situations though where being into white guys or gals would be fine in the US but not into black guys or gals. And in Japan it'd be fine to be into Asian guys or gals but not everyone else.