I'm not going to go down that rabbit hole any farther than to say each of the people you mentioned HAS experience. Each is right about a lot of what they post and say. Also, each is wrong about a lot, too. But then, we all can fall into that category. I bet if all of us had a camera following us around a lot, we'd all see some really stupid chit from each other.
My main point is what you know is more valuable then how you know (if it is right), I'm not saying book learning or hands on or etcetera is more valuable than the other they all leave holes/gaps if only focus on one.