Nah, shitty players are shitty no matter what. If you have a great tank, healers can by without needing to work too hard, if you have great damage dealers, tanks don't have to work as hard, etc. While I agree that level sync has indeed hurt people at lower levels (My samurai still doesn't have capped gkt for the level, despite my best efforts I'm still about 14 under) but the person in question just sounds like a pretty pretty princess RDM. You know the sort, the ones that figure because they're the RDM, everyone else has to work harder to keep them pleased. I once partied with a samurai who we shall just call Jade R... No, wait, too obvious. J. Rattlesnake who insisted on getting haste right away, despite having a ninja in the party.
The flip side is, thanks to level sync, you don't have to worry if that douche of a healer is the only one your level seeking. Friends with the job are nice to be able to call in for favors, and if the exp is decent, most anyone will sync back down to the sweet spots right around 60.