Since when does not going into a macro game mean you have less skill?
I really don't understand this logic. If you were to play f.e. PartinG as zerg (and let's assume you know he wont do the WonWonWon). Do you think your chances are higher with a 6pool or going into the lategame?
A cheeser is only following a build order (There is no skill in placing a pool at 6, 7, 8 or 9...), the skill comes in play when the cheese "arrves" where you have the ability to micro and since a cheese is DESIGNED to give you a huge advantage in the early game, you don't need to trade AS efficient as the defender.
Hence, a cheese is nowhere near an example of skill and will only get you free wins, not improve your game.
HOWEVER I think it's a very valid part of the game. I'm really tired of seeing everyone rushing to 3 bases and nothing happens for the first 15 minutes. It feels like Blizzard aswell could let us start on 2bases, that's how boring the current meta game is. So in that way, cheeses are great to keep players straight and not 15cc every game.
But as for people cheesing on the ladder, they're only focused on getting those extra points on the ladder - not improve.