I have also always respected Land's intellectual honesty. I think the closest primary source to your point about the cybernetic OODA loop and competition is Land's text Against Orthogonality:
"Any intelligence using itself to improve itself will out-compete one that directs itself towards any other goals whatsoever. This means that Intelligence Optimization, alone, attains cybernetic consistency, or closure, and that it will necessarily be strongly selected for in any competitive environment." [0]