One pattern I've noticed working in large orgs is that management generally simply cares about self promotion. Managers want to be able to build out a portfolio of impressive looking projects they've supervised, and use that to climb the corporate ladder. And this often ends up turning into a sort of a pyramid scheme, where the product manager hunts for a bigger project while creating the appearance that their current project is going great. They get promoted, and somebody else gets saddled with overseeing the completion of their original project. This creates incentives to rush things, and to deliver visible features without worrying about quality or sustainability.