[likeabatterycar]

> The outcome of this idea is Google & Microsoft can MITM all internet traffic.

Google, MS, and Apple already handle their own CA trust. So this conspiracy theory would already be true.

[ForHackernews]

Wait, is it a "conspiracy theory" or is it true? Are you claiming both? I'm aware that Google, Apple, Microsoft etc. could already MITM traffic to Chrome/Safari/Edge browsers if they were so determined.