Your sample is wrong. We are comparing the number of successful new companies that came out of VC vs the number of successful new companies that came without VC.

...and it's easily obvious that almost all of the new large tech companies emerged from VC.

No, that's what you are doing. What I'm doing is comparing the number of successful companies that came out given that the VC system exists versus a situation where it doesn't. We don't know how many potentially successful companies haven't been started, or got strangled in the crib, because of the dynamics of the VC ecosystem and the fact that it exists.

Also it's an error of remarkable proportions to assume that "massive company" is synonymous with "net positive to humanity", particularly in tech.