You are of course correct Pontius - people put their lives in danger to help others without being asked in just about any armed forces
but I think the US Study - which I must try and dig out tonight -was more one of these Cost/Benefit things - looking the systemic issues. Yes putting in more COIN aircraft would have a very positive effect on the whole USAF/Army ability to take out the enemy BUT there is a cost and it's in human lives
Tough call TBH