Also, he's written an incredible series of groundbreaking papers throughout his career, going back to 2005. His papers tend to hold up very well. At this point, I carefully read any paper with his name on it, and I believe he very much deserves the honor.

Isn't the point of AlphaGo that Go is a minor detail?

Doesn't sound right as the point of AlphaGo itself. Generalization to other games came later, under other names (AlphaZero and MuZero).

Of course. I could imagine that he contributed 50%, 75%. I still feel bad for the team though!