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...
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).