I don't know who came up with the idea of discarding the yolks. But, someone needs to crack him upside the head with a chair. Not only are you discarding half the protein of the egg, but you're tossing precious nutrients, including cholesterol (Yes, CHOLESTEROL), that can help your body increase in size and strength.
The old-school bodybuilders lived off whole eggs, yet they had little problems getting lean. I'm quite sure you can whittle some fat away from some other foods to compensate for that contained in egg yolks.
In short, eat the blessed things; don't throw them away.