FWIW, for most engineers the entire Search org chart, all the way up to Larry, is engineers. Larry was an engineer, Alan Eustace was a hardware engineer, Amit Singhal is an engineer. In my management chain there are two people with an M.S. in computer science (Larry is one of them), zero with MBAs, and everybody else has a Ph.D in CS.

If your mental model of Google is a bunch of MBAs who tell engineers what to do, you're quite incorrect. That's Microsoft.