One could claim that this is the current state of the American aristocracy. For all of the wealth inequality, I see very few instances of "Zuckerberg Theater", "Gates Hospital", or even a "Brin college".
Perhaps I am misunderstanding your comment, but one of the largest hospitals in the Bay Area is quite literally called Zuckerberg Hospital: https://www.zuckerbergsanfranciscogeneral.org/
Gates has given many billions to public health initiatives as well
What, $40b for a dying social media company that no one will remember in 25 years vs literally anything useful and enduring? My post office is 130 years old!
I think that the Gates foundation has spent hundreds of millions of dollars on malaria initiatives alone. When I lived in SF, Zuckerberg Hospital was pretty close and it was pretty gigantic. Mark Benioff has spent hundreds of millions on Childrens hospitals in Oakland and SF as well.