What Jason Fried is expressing is something I've been pondering for a while. And I think we'll (hopefully) see more of it (sorry, manager-types). In my experience, managers in most departments have essentially taken the role of sheep-herders. So, I started to ask myself: why do I need a manager when I work well on my own, making smart, educated decisions that are based upon the ideals and successes of other smart, ed…
Though I am a dreaded project manager, I agree mostly to what you are saying. But in the field I work in, advertising, I do think that its necessary and that my value is additive. My responsibility is mainly to be a shit umbrella, so my creative and developers can do work, especially when we're all working on multiple clients. I'm not doing my job when I have to have them in meetings, in fact we don't meet save for f…
So for me doing PM work is actually more of a horizontal promotion, doing some different work because I like it, while I am definitely not "in charge" of any people now.
I guess my point is that even picking up PM work can be a horizontal promotion.