I think the problem is that strategy is hard and frequently requires divestment. Your head of inbound marketing isn't going to tell you the company strategy should switch to outbound marketing so let's cut my team in half and throw away everything I've built. My company is suffering this right now. We're doing annual roadmapping and it's entirely a program plan. Our business has shifted over the past 5 years and now there's a lot of initiatives being pitched to justify their department's existence.
"Your head of inbound marketing isn't going to tell you the company strategy should switch to outbound marketing so let's cut my team in half and throw away everything I've built."
1) Some might, if they see other roles/opportunities for themselves in the event they do
2) Generally your example is a call their boss or another overarching leader would make, not someone within the system/strategy.
Yeah, my example is a bit reductive but some form of this happens pretty frequently. Especially when the high-level decision makers are relying on their reports to provide inputs to their strategy decisions.