if someone (say someone from marketing) has a need for the product, and it gets de-prioritised, someone has decided the marketing person's needs are less important. That's why product teams have to be cross-functional and have ownership. You can't just have a board of execs 5 levels of hierarchy removed switching and swapping people randomly.
also why there are so few product teams. There aren't many execs willing to put the trust in their people to give them ownership of products/problems/opportunities/outcomes, without wanting a micro level of control on the solutions. Which is always hilarious because they hired these people in the first place (or the ones who hired them etc...)