The quest is misleading. And yes, people will quit, no matter what you think of them.

I already grinded up to 35 to try a level 30 quest, grinded lancer, and grinded before that just to start the quest. I'd actually say tons of people would be quitting before putting in as much effort as I did.

You can only say "just put a little more effort, just put a little more effort, just put a little more effort" in this case, effort being grind, before people will say "wtf? No. This is just grinding. I'll just go a play a game that is FUN"

BTW, shoulder tackle is basically a level 2 WoW warrior skill. Grinding 10 levels just to get a level 2 warrior skill? Naw.