...worth considering how societal prejudices may have shaped your attractions...
Anything is "worth considering", I guess, but this kind of comment is easily considered and rejected in the context of homosexuality, as it's classic and well-worn (and when people push it in this context, it's of course homophobic). There are a few fallacies at play here, I think.
(1) Conflation and confusion of sexual preferences with sexual orientation, something Stonewall used to consider part of its mission to educate the public about.
(2) Conflation and confusion of private choices with public life, a la "single sex spaces aren't needed 'cos you'd let your husband/dad/brother/son use the loo at your house".
If I'm constantly complaining to my friends that I really want to be in a relationship but I somehow can't meet anyone compatible who's also between the ages of 29 and 31, at least 5'11" but no more than 6'1", has blue eyes and red hair and a PhD, lives no more than ten minutes' drive from me, etc., THEN maybe my friend is reasonable to say I'm too picky and should maybe consider a blond 32 year old who lives 15 minutes away.
Sexual orientation is not the same thing as dating standards.
Rejecting a potential partner as not compatible is not the same thing as legal (prohibited in the UK) discrimination in public life.