They're made by gaming companies.
They're made to be played, thus they're games.
Admittedly you pay to play them, but play them you do.
much like people pay to go paintballing, or they pay their online subs to play Halo over LIVE, but those aren't ever moaned about.
Repetative grind is a necessary part of any level based game, so considering it less then a game for it is ridiculous(example: You grind shitless, possibly even about 6 times as much on Pokémon games, but no one ever complains there do they?)
Yes, the people who tend to get furthest in MMORPGS are the ones that sudy and research ever subtle nuance of the game's mechanics for more advantage, but don't people do that with fighting games too?
At the end of the day, there is a counter argument for most of the issues that people seem to have with MMOG's, I mean don't get me wrong, WoW lost it's charm for me about half a year ago So i'm not exactly the greatest fan or supporter of the genre anymore.
but at the end of the day, even considering an argument on whether they're games or not just seems a tad ridiculous to me.