This is because I see it as an act of volunteering, in which the power leveling players are willing to give up their time to help out their friends or family members.
Yeah, if only it actually worked that way. Now it's more like you rub my back, I rub yours. 8 people taking turns PL'ing is not much of a "volunteering" as it is abusing the system for your own advantage, regardless of your role as a newb or a long-timer.

Level Sync would still be better, but at least getting rid of this brainfart would be a step forward (after 10 steps back).