My brother went to Carnegie Mellon. He went to do biology but lived with 3 programmers and ended up getting a CS degree. Couple internships and then straight

My brother went to Carnegie Mellon. He went to do biology but lived with 3 programmers and ended up getting a CS degree. Couple internships and then straight into a FAANG. Never had any other paid work outside of a couple summer working at a greenhouse shoveling dirt for a couple months. Complete inability to understand how a lot of folks live. Lives in a "California bubble" even though he hasn't been in SF in a decade. Definite "engineer's disease" where he's able to think through technical problems like a genius but can't challenge his own assumptions about anything else and assumes domain expertise transfers easily.