Some. But there is also that thing where manager is supposedly paid for superior social skills. And lately I am realizing, that good 80% of communication work in the manager-developer relationship or within team is on developers. I mean, yeah, partly it goes with power differential where person lower on hierarchy has to do that work and management simply dont have to.

But seriously, it would be nice if managers would put a bit more thoughts and effort into ... communicating and people.

From the sound of it the OP really did go out of their way to try to talk this one through. Of course communication is a two way street, but communication is basically the only job a manager really has at the end of the day. It is their primary responsibility and they should bear the brunt of the responsibility for any communication breakdowns. Sure devs can be hard to talk to. Managing people is fundamentally a hard job. That's why it pays well.