I somewhat agree with you, but the overwhelming valuations of the companies give me some concern too.
At this point, whether I like it or not, a handful of tech bros control the fate of my retirement account even if I have nothing to do with them. If someone has a bunch of VOO, then at this point half their value is in the hands of a few tech companies. On top of direct potential impact from messing up, the companies know they have the economy at large as a hostage, and government has proven it's happy to recognize "too big to fail" and socialize the losses while letting the gains be private.
So an institution passing a certain size broadly gives me concerns.
Now on the other hand, the other "capitalist" outcome outside of founder mindset is usually ruining the company faster, selling it for parts or otherwise exploiting previous success for short term gains. I totally get that the only thing more risky for a business than founder-aligned capitalism is the "capitalist for the sake of capitalism" that will drive great things into the ground if it means a few more percent wealth right now.
So I think you either somehow limit the relative value of such companies to the broader market (no idea how, but somehow), or accept some societal governance over these 'too big to fail' companies. If society is going to be on the hook for bailouts, then society should have some say in governance ahead of the bad outcome that demands a bailout.