Why do people perpetuate the bosses narrative?

I think of the workplace to be like an orchestra. If there are 4 to 6 musicians, then agreeing on what piece to play and playing from the same score usually works well. This is like a startup. Now consider a 100+ piece orchestra, even when everybody is playing from the same score you need a conductor to set the timing and to indicate the passages, etc. That's more like large companies.

In my experience, in large companies there are too many bosses. But there still needs to be somebody to set the strategy and plan the implementation / delivery.

Heirarchies keep groups stable long enough to get some specific work done.

After the work is done obviously they have no great purpose.