I don't see how micromanagement is fun or elegant. It's a lot of actions with zero strategic choices. Once you learn the trick, you just do it.
The concept of Opportunity costs makes this statement entirely untrue.
Let's say in civ4, you and an A.I. start constructing a wonder. Under normal circumstances, the A.I is going to beat you to this wonder by one turn. Without knowing this information, you decide to chop your forests to give yourself a boost because the wonder is important to you. You've now beaten the A.I. to the wonder - but you used your one trick. Given the exact same scenario at future point in time in the game you would not be able to rush the wonder, and the A.I. in that case would beat
you to the wonder. So in this particularly isolated case, the decision of
when to chop can have vastly different consequences.
Aside from that, I can come up with a multitude of reasons why the decision to chop a forest and when can have immense strategic implications. Further, Whipping population has even greater opportunity cost because you're losing population and increasing unhappiness for a period of time.
The logic of "once you know the trick you just do it" applies to virtually every single decision making process in any strategy game ever. In every turn, with a specific goal in mind, there will
always be an optimal decision to make. It's mathematics. But, we're not computers, so those decisions aren't always apparent to us. It's fun be able to dissect the nuances though - i.e. micromanagement.
Example; Let's say you go to war against an A.I. and you are capable of winning... But you lose. Then you didn't make the optimal decisions. If, at the start of the war it was entirely possible for your side to win, but you lose, then something was wrong with your decision making process along the way that, if managed differently, would have made you victorious. Your "micro-management" is affecting the outcome of this war. This is a good thing and fundamental to games in general. There is even micromanagement happining in a game of street fighter 2, it's all happening in a millisecond, but it's there - tiny decisions that affect the overall outcome of the game.
If I said I liked the combat in civ5 because I enjoyed micromanaging all of the units such that I can beat a large force with a relatively small force, it isn't as simple as "learning the trick and just doing it" - I know the tricks, I use them, and sometimes I still fail because I'm not a computer and what I thought was the appropriate decision turned out to be the wrong one. Through micromanagement in war in civ5 - I can defeat a force of 10+ units using only 5 of my own. That doesn't mean I can do it
every single time.
Further, the fact that I know how to do it doesn't make the process of doing it any less fun.