For all I've heard about WB the last few decades, I couldn't tell you a single thing he's done that's impacted my life, the country, or the world. AFAIK he's a guy who makes a ton of money, plays bridge with Bill Gates, gives advice, and has a fund that made money for other people. Am I missing something?
He's not a politician, he doesn't have to.
Still, he's given dozens of billions in charity, given important counsel to the government during the 80s and 2008 financial crisis.
During 2008 financial crisis he essentially saved Goldman and General Electric both preventing further escape of capital and an even worse situation for the US and potentially world economy.
In any case, he's a capitalist who likes making money for himself and his shareholders, he ain't a medical researcher or your mayor.
Buffett invested in boring industries like insurance. As unexciting as it is, businesses like that basically are the invisible infrastructure that makes society work smoothly.
Don't misunderstand flashy at the only way to be important.