1. Most people don't go to HSW (Harvard, Stanford, and Wharton) to start startups. Well, for some edge cases, it is a way to get admitted. Many of the grads here love to get hired by PEs like KKR and Blackstone.
2. Business schools are good at marketing themselves: they try to set up labs for new trends, fads, etc.
Are you coming from tech going into finance?
Nope, and am in IT. I had buddies who wanted to move from tech to IB, Consulting, etc.