>But good technical project managers aka "bridges between the higher-up beancounters and the workers" are worth their weight in gold.
Yeah but it's not easy do distinguish those from the snake oil salesmen who are just good at smooth talking during the interviews.
Pretty easy. Get them to talk about a project they've managed and start poking holes. Who was on the team? How did they organize meetings? What were the bottlenecks? How well did everyone get along? What did they do to help grease the gears? Did they have to change the process? How did they like the software? Which software did they use? Did they have to administer it themselves? How did they deal with management changes / team changes / tons of support requests / issues in production? Where did they draw the line between PM work and engineering work?
You can interview prep for all those questions and lie.