You mean why doesn't Apple sell music devices that can't run an App store? I think they make a lot of money from the app store, so they'd probably lose a lot of money by doing that.
(I don't know about Apple's current iPod lineup but I'm assuming they all have the app store on them. I do miss my old iPod classic though.)
(I don't know about Apple's current iPod lineup but I'm assuming they all have the app store on them. I do miss my old iPod classic though.)