"Unique Backgrounds" meant women or lgtb or non-asian non-white. They often came from top schools, so that didn't really matter. It is way easier to get into Google via this program so some lied about being gay to get in.
the fact that this programs exist in the first place is a problem. how is it fair to have different interview processes for certain groups of people? it also results in underpaying these people and making it difficult for them to leave.
it is unfair to require leetcode bullshit interviews from candidates who apply for a job via the normal route but at the same time have programs in place where people can enter some kind of internship or training program via which they can be hired into similar positions without going through the exact same interview process. in fact, it is illegal.