I think that's a sad reality.
You know those interviews before/after the videos like the ones Woodman does?
I've watched a couple dozens of them and when the girls are asked whether they'd ever marry a black guy ALL of them say no.
Only one said yes, but she doesn't fuck black guys on camera because she wouldn't like to have a video with the word 'interracial'.
btw for the most part I agree with you and I'd add an example, pornstars.
A lot of them are married and their marriages work well enough, all swingers and functional.