So you don't play those games. There are lots of games, even modern games, that don't require big time investments. Monkey Ball, Mario Party, Burnout, The Guy Game, Ikaruga, Mario Golf (or any other golf title), Mario Tennis (or any other tennis title), Animal Crossing, Bust a Move, etc.
I don't play RPGs, even though I really like them. I've never even seen World of Warcraft and just last night turned my little brother down when he offered to give me his copy of it (he doesn't like it). I just don't have the time for games like this and would rather not even have the temptation around. But a lot of people do have this kind of time and they want to play games.
I can totally see not spending $500 on hardware when you only like a small minority of games, but so what? So you're not going to be an early adopter. A few years down the road it'll be $150 and there will be dozens of good games that cater specifically to the minority of casual gamers that you belong to.
Games may have had simpler control schemes in the past, but since the NES they still had big time requirements. You couldn't beat Mario in 11 hours your first time through the game. Same goes for most the other games you loved including Kid Icarus, Bionic Commando, Zelda, Metroid, Castlevania, Final Fantasy, Blaster Master, etc. You grew up and got responsibilities. That doesn't mean that games all have to grow up too.