I'm not totally sure how "Addictive" has anything to do with it. If you dislike it, that's totally acceptable, not everyone likes mmo. Yes it gets boring. Clicking? If you're clicking, you're doing it wrong.
However, saying that the game requires no skill is rather incorrect.
The simplest point i can lay out for you is the class skills available to you.
http://www.wowhead.com/?spells=7.5&filter=cr=12;crs=1;crv=0
The link above shows 50 different priest class skills, of which and depending on the scenario you're playing in, would require you to be using most of them at a certain point.
Each game has its requirement skill wise. RTS proper micromanagement, FPS proper aim and awareness and so on, RPG requires precise knowledge of mechanics as to properly decide how to improve your avatar, as long as the knowledge of how each skill synergizes with the rest and with the team with you.
There's more diversity in an MMORPG than there is in any other game, World of Warcraft or not.