Because they are wizards. The brightest and most enthusiastic of the magical users. Let's take it, sorcerers are just lucky to have some magic, warlocks need to sell themselves for a tiny bit of might and also my cleric is just a prostitute of his god to get some power. Wizards are better, deal with it.
I presume that the fact I don't have such a big problem with it is related to my use of wizards, in this case Gale. I only use a very restricted number of spells I like and don't have the feeling that the versatility of wizards makes them especially strong. Gale is a funny person (he is too young for a wizard in my opinion however) but, frankly said, he is only in my group because of the Misty Step - Thunder Wave combi which saved me several times in very desperate situations.
