When changing out a string on my bows, one of the first things that I do is set the cam lean. It can change with a static yoke. Each side can be adjusted to bring the lean into proper specs. This can get a little tricky, but it must be checked throughout the adjusting process while bringing in both syncronization and timing.

I don't think that is has anything to do with brand bashing at all. I used to set my Mathews cam lean in the same manner as I set my hoyts.

When you put on new string and cables. How would you know that it is the exact length? If both sides of the yoke are the same length, a cable slide would make things even worse by pulling more on the far side of the axle .

Cam lean has everything to do with bow tuning. Bow tuning goes much further than just trying to set the arrow rest.

If unequal forces are acting upon the axle, it is twisting the limb throughout the cycle in a manner than can be detrimental to accuracy..