Maybe he didn't intend for this event to lead to anything beneficial? It seems clear he's doing it out of passion (and science, maybe). He's not spending public

Maybe he didn't intend for this event to lead to anything beneficial? It seems clear he's doing it out of passion (and science, maybe). He's not spending public funds and even rejected Google's support for this project. Just because he's a Google executive doesn't mean he is obligated to fund cancer research. And how do you know if he hasn't contributed to philanthropy? You could ask the same question - "Why are you spending X dollars on Y instead of Z? What's the value in Y?" - to almost anybody.