Managers are just employees as well who also pick projects that will benefit their careers. Why work on a small thing with a few million users where you will ne

Managers are just employees as well who also pick projects that will benefit their careers. Why work on a small thing with a few million users where you will never get promoted since you are already at the top, when you could just move to the next growth ship where lots of people are hired so moving up the ranks as a manager happens naturally? To me it seems like this culture seems to go all the way to the top. It is not like Sundar got promoted so quickly due to his work on an obscure product.