You literally don't know what you're talking about (I do, professionally). We are far better than being limited to just "obvious" targets. It's a large country and takes weeks of sustained airstrikes to get around to everything planned. Of course there are priorities... your "obvious" front line military hardware targets take precedence because they are potentiality more dangerous to our forces and mission. Then lower-intensity (less capable) hardware, munitions storage and ultimately things like production facilities.

I wholeheartedly agree, if we try to take and control the entire country. That would be ludicrous, and everybody in the national security establishment knows it. Trump would get impeached if he tries to go there.

But there are other uses for boots, expensive but not irrational.