It's hard to prove that this happens to any given individual, because employers aren't mandated to announce why any person was "overlooked". One might be quick to blame "structural oppression", racism, sexism, or any other -ism or -phobia, but that doesn't necessarily make it true.

I agree with this somewhat, however, facing structural oppression is very different from deciding if a journey simply isn't worth starting. The mindset and disposition you speak of is or is not inclusive of assuming oppression will fully control one's overall success and happiness at a company?

Yup but still a poor attitude to have. I feel this way often times as a white male in tech, that they would rather hire literally anyone else if they can add some much desired "diversity" but I'm sure you would disagree that this is the case. Better for me to try anyways and have the best possible outlook even if I believe the cards are stacked against me.