I think it's a matter of bee-hive logic. I mean, the Force is this big thing that ties everything together, but it's not really "conscious." If you have mitichlorians, you can manipulate the Force, and if the Force thinks a person needs to exist, it makes one (like Anakin) with a ton of mitichlorians. It seems to me that the mitichlorians are like a stamp at the bar door: if you have the stamp, you can do whatever you want in the bar. If you don't have the stamp, you can't do anything. The Force owns the bar and is the bouncer, and it might grab people off the street and stamp them just because it wants them in the club. Granted, it's not a perfect metaphor, but the point is: the Force decides who gets mitichlorians, then the people decide what to do with them. Maybe they do nothing. Maybe they move fruit. Maybe they Force-hover up to look in girls' windows on Coruscant, we don't know, but whatever they do is up to them. The Force is kind of like a god in that it gives the people all the stuff it needs them to have, but then it kind of just lets them do whatever they want with it. Like, God never took away someone's hands because the person was doing jazz hands too often. Poseidon never vanished all the water because people were just splashing each other with it. It's like a bee-hive: most things can't come in, but if you get in, nobody pays attention to what you're doing. You could just loaf around and do nothing and you wouldn't get kicked out because once you're in, you're in, no matter what foolishness you decide to get into with that privilege.