The comment was not about heterogeneous or not. It was about Ph.D. or not. Everything else equal, I'd prefer a heterogeneous bunch of Ph.D.s to have designed and built the thing that's put inside my brain over a similarly heterogeneous bunch of "I've taught this myself in 1 year using youtube". Snobs or not.

Ph.D.s are trained in two things. "Reasoning about an unknown" is one of them. But the particular niche knowledge they acquired while training this is the other. That niche can save my life if the niche matches the thing to be implanted into my brain. No matter how many youtube-educated wannabe-experts take issue with formal education.

(I have many issues with the academic system, but this kind of critisism is ridiculous.)