The fella is a Phd in Computer Vision at MIT, which means that it's reasonable to assume that he knows pretty well the field of Computer Vision, which is a subset of the broader universe of Machine Learning.

Leaving aside my assumptions for a moment, the guy happens to have tens of peer reviewed papers and articles ranging from deep reinforcement learning to AI explainability. I never said that he knows to press buttons in a pythonic way (even though I assume he definitely can).

Preferences are a different matter, I respect yours.

I jumped in there only to point out my view about his work and how he approaches his interviews.

Since I was asked to report where and if the guy is competent on the matter of ML, I simply provided some references.