I also think it's even arguable that MIT has more prestige than Harvard - of course this will depend how you're defining prestige, but people definitely assume high intelligence when they hear a student goes to MIT in a way they don't for Harvard. Which I have to imagine is at least somewhat explainable by the admissions differences.
Caltech is a much smaller school and is maybe a better example of a school that's underrated by people who don't know better? But for any reasons that prestige would actually matter I doubt Caltech students have any problems either.
Citation Needed.
Oxford, Cambridge, Imperial, the LSE, Sciences Pos, X, ÉNA are all counter examples. You can select purely on academics just fine.
Obviously the people involved in the process were generally ethically minded but if this thread shows anything, it’s that two people may do quite different things while each trying to act ethically.
This is why Stanford and Harvard are far more popular and recognizable compared to Caltech and MIT even though the quality of the students is virtually identical.
if you work in admissions as a place like Harvard or Stanford they will tell you point blank they make those kinds of "sentiment" considerations. I'm personally not a fan, but I get it.