Occam's Razor tells me it's because they are being painted as capable of subverting seemingly larger-than-life systems and institutions. I imagine it's an ego boost to a lot of these tech CEOs.
I agree with you about investment in education, healthcare, etc., but those things won’t pay the rent and buy groceries I’d there aren’t enough jobs.
Look on my Works, ye Mighty, and despair!
Nothing beside remains. Round the decay
Of that colossal Wreck, boundless and bare
The lone and level sands stretch far away.