I personally like console or "hardcore" games more than some of these other games, but let's face it. The vast majority of people with the money that buy Apple products and browse around the game apps are looking for something quick and amusing to play on their coffee breaks or inside their cubicles hoping their boss doesn't catch them slacking off by blowing up green pigs with an assortment of colored birds.
Yes, these games aren't complex, and they don't have the sophistication of console games. But they're addictive, simple, and fun. I enjoy playing Angry Birds. I'm a little bit more open to creating "casual" games, but I certainly wouldn't want to toss away the more traditional, console game ideas I have. Think about it; these games aren't overly complex which = less work for developers + huge consumer base that likes these kinds of games = more cash = funding to create even better games.
At least, that's how I'd approach this situation. Maybe they'll continue to make Angry Birds 2, or whatever, but if you take advantage of this system and come out with your own "casual" game and it becomes a hit, you can gain profit and use that to fuel production towards your "hardcore" game.