The book "Elephant In The Brain" devotes an entire chapter to how the education system is effectively one large, expensive signaling mechanism. It was an interesting read that I'd recommend checking out. For the record I completely agree with you and I'm saying this as someone with a STEM degree. The "signaling" aspects of our education system completely break down in tech. I would personally need a lot more info than whether someone is an MIT or Stanford grad to want to work with them.