This makes me raise an eyebrow in suspicion. I wonder if they need to be (as best as possible) in balance? Doing = knowing. If I know nothing and do, do, do, how do I know whether I’m causing harm or not?

I totally agree that knowledge without application is useless, or almost useless. But I’m cautious to swing totally to the other side.

The doing has to flow from our knowing, and our knowing must be constantly evaluated from the results of our doing. And I think you’re making this point when you say “the doer will eventually know more over time…” But I think this is true only as long as they inform each other and I would suggest that they REQUIRE each other in order to create good rather than descend into doing harm either by accident or on purpose.