I don't work in coding but as sysadmin. And the same stuff applies.

Projects with multimillion dollar outcomes are somehow managed by people who don't stoop to ask your team anything in the planning phase.

Instead they come in the implementation phase and want you to jump. Then you point out the resources required - in writing - and the fires are burning...

At that point, I may help or may not depending on whether they pay good overtime and it suits me.