Ronnie Coleman is a both a better police officer and a better bodybuilder than you. He possesses an absolute advantage in both policing and bodybuilding. But he's better at bodybuilding than policing because... yeah buddy.
You suck at both, in comparison. In comparison, you probably fail at life, and should be smacked around just for trying to exist. But you're a better police officer than bodybuilder.
In this instance, the utility of society will be maximized if Ronnie stickes to bodybuilding, and you do policeman stuff, instead of him trying to split his time doing both even though he's awesome at it, because every moment he spends issuing traffic tickets is time he could be spending lifting, eating, and recovering. So rather than lose precious time lifting 'nothing but a peanut', its best if you be the copper. You're not quite as good at it, but you doing it allows Ronnie to focus on doing what he does best.
This is how you can have a comparative advantage police-officer-ing, even when Ronnie is totally better at it than you.
C'mon guys, it's a bodybuilding forum.
Also, if the above is deemed offensive, sub 'me' for 'you' and it won't seem so harsh.