LOL yes but how often do you see someone ask "Are you from an Ivy/feeder school?" as compared to "Are you URM?". I don't think that's the only reason it's ever asked.
Also, how is it commonly known that schools prioritize URMs, Ivy/feeders, etc. when reviewing for interviews? I know of several elite undergrads that don't even upload their committee letters until August, making it virtually impossible for these students to get early interviews. As for URMs getting early interviews, what kind of sample size are you going off of? A few posts in an online forum that likely represents < 1% of the entire applicant pool? It shocks me sometimes how many premeds post long-winded paragraphs describing the ins and outs of the applicant evaluation process like they know some kind of insider information. To be honest, it's likely that most pre-meds will never know the intricacies of each individual school's timeline, evaluation, schedule, preferences etc., especially considering you will only matriculate to one school and your only other information is speculation and anecdotes from online forums. Instead of purveying the idea that there are hard and fast rules of the application process, I think we need to calm the neuroticism by letting the process happen on its own.