Say Tiger Woods or OJ who seem to prefer blondes, or Nick Cage and Soros who seem to recently prefer East Asians. Does it matter?
Question is, does it matter? What if someone likes BBW and fetishizes it, do we care? If they then marry a BBW is it no longer a fetish?
The one argument you can make against fetishizing a group of people is that it's reducing members of that group to fetish objects.
So if you're an Asian woman trying to date seriously, you'll get a bunch of white men who only care you're Asian and nothing else.
I don't know how much of an issue that is in practice (and I'm sure it's different in diff parts of the world).
[1]https://www.gwern.net/docs/psychology/okcupid/howyourraceaff...