Why are video game commercials so bad?

Other community members have complained about the lack of good commercials, but thus far I haven't seen any ads lately. This isolation comes from not watching TV, except for MSNBC in the cafeteria . . .

The last commercial I saw for a game was The Metroid Prime 2: Echoes commercial with the street lights and the woman walking through them. That was a great ad!

The only other tv ad I can remember is the PS2 Shinobi one. The best part was the game case sticking into a tree like a throwing star.

I've never seen a commercial for God of War, for Battlefield 2, for Kingdom Hearts 2, or even for Halo 2. I watch the promotional trailers on GameSpot a lot, but in the piles of trailers, I can't say any of them are reprehensible. Really.

Maybe I am just immune since I have a marketing background. . . or just bad taste. Definitely the former.