I agree, unless you can find the games on disc for cheaper
I guess that's what all the online DRM is for. you need something to stop people from just installing the game onto several consoles from one disc. making you have the disc in the tray was their old way. in general the DRM was client side, but that allows people to get around it by modding the hardware
it's also a different system, in that the game won't play off the disc, period. it's like PC's where you have to install it. ultimately that's a good thing, since the data rates and whatnot are way better with a HDD. a lot of stuff they're trying to do (the actual gaming stuff, not this DRM crap) would probably be held back by optical discs