I grind in an RPG to get awesome abilities that would augment my fun with the combat system. I grind in order to reach the same level of strength of a certain boss because RPGs are still inherently based on stats and not skill(although the line is blurring slowly but surely). I grind because it's sometimes a prerequisite to get access to certain types of content. I grind because killing baddies with buddies is pretty fun.

I don't grind because I give three shits about hitting max level or stroking my "e-peen". If your own worth in a video game comes from having other people idolize you(and why would/should they?) as opposed to having fun along the way and being a great member of the community, then you can piss off.

If a scant amount of people are powerleveling and the only things being hurt are your fragile egos as opposed to actual game mechanics being broken(which may or may not be the case), then why should anyone care?