No, in fact, the PS2 was the most difficult to program for in the previous generation. Xbox and Gamecube were designed around familiar architecture and established standards so that it was easy for developers to embrace the platform. Sony did what it has always done and took its own completely untraveled path.
The number of games available on PS2 has WAY more to do with the large established user base of the PS1, and a combination of the timing and price of the PS2 (it was a "cheap dvd player" for so long, that lead to a large PS2 ownership). There are more games for it simply because there are more units out there. It's a much bigger group of fat wallets to grab money from than say the nGage and its measly unit sales. Nintendo didn't have such a large group of loyal fans coming off the n64, and Microsoft had the skepticism of the entire industry to battle.
As for discounting the Wii, I think unless you are one of the lucky few that has had a chance to use it already, you have no idea what you are really in for. You can do what you want, but I bet once you try one you will like it. Even Sony is nervous about it, else they wouldn't have added the tilt sensors to the PS3.
It sounds more like you are discounting the alternatives because they aren't the choice you have already made.