Well, if you actually build the feedback loop then you solve this by weeding out the bad ideas.

This is like going to a startup as a senior bigtech engineer - if you can’t ship it becomes clear quite quickly.

Regarding the talent dysmorphia issue - the best way I know of getting people to step up is to give them more agency and more accountability. The new world will require that IMO.

I think Google etc are more a story of how much you can get away with when you have a strong monopoly. Their orgs are not shipping fast, nor good at shipping products. (Google in particular is incredible at infra but laughably bad at consumer products.)