project manager are there to free devs mind from various distractions.

I'm glad I can delegate them the reasoning about which task is more urgent, and them acting as buffer to clients frees me from a lot of time trying to understand what they want, how they want it and all the back and forth about how much they want to pay for it.

good project managers, that aren't just bossing internal people around but working with the team at different part of the projects like communication and operations, are rare, but are a joy to work with.