https://youtu.be/UOYi4NzxlhE?t=87
It's a useful skill, but not worth 7.48B IMHO. They say hate the game, not the player. But then, the players have chosen this game, and often don't want it to change.
He may be qualified to make that call or be as unqualified as any random person off the street.
Apart from this, what is telling about it?
Why do we listen to these people with no experience in the tech field and no knowledge of how google works internally?
20% vs 21% is basically meaningless in this context. We can't run it a 1000X or see the counterfactual to know what figure would be more correct.
I just take 20% to mean "a good chunk" and much preferable to a style of fake precision you seem to think is better here.
To do any real analysis you'd need an org chart, head counts, and a P/L with much more granularity than Google publishes. He has none of these. The people with all of those chose 6%, and even that seems to have been largely due to pressure.
This guy is only pressuring, there's no data behind this, no reasoning, nothing smart or worth listening to.