I am a casual player and I do not agree.

Because i don't have the time to finish all my leves generally :

In this game, i have to :
- doing my 8 leves (plus mybe some of others in party)
- raids
- visiting
- managing items
- selling and buying
- crafting
- questing and guild tasking
- moving
- doing my macro
- grinding low ranks
....

I don't know what casual mean to you but lol i can have enought time