In some cases, school is a legal way to discriminate. The top tier companies incorporate recruiting into their culture.
If you recruit at Brown, you’re going to get a different candidate than some CUNY school. They all tested well in high school or have parents with good networks, and they tend to look and quack alike.
"Culture fit" is just another way to discriminate a candidate based on race, age, or gender.
HR from my company has explicitly told all interviewers not to use "culture fit" as a reason to disqualify a candidate presumably to avoid potential lawsuits.
If you recruit at Brown, you’re going to get a different candidate than some CUNY school. They all tested well in high school or have parents with good networks, and they tend to look and quack alike.