As a developer, I don't see the PM as a boss or planner. It's the guy that handles the communication with all the people that don't understand what I say and ensures that they don't annoy me.

A PM is not optional when you want to have developers that have time to code and don't get distracted by thirty people that all want something else and all ASAP.

That sounds more like a project or engineering manager role. Work environments obviously vary, and sometimes roles are assumed to counter dysfunction. But the PM here is the product manager, which owns the product direction. The argument is that their role can now venture into building. My comment extends it further that they can actually become the builders, absorbed into engineering and design.

exactly - a PM's job is to sail the high seas of wherever you sit in the org chart and general corporate political landscape.