Having it on an iTunes account means you spread it across multiple devices with ease (something said DVR cannot do), and don't have to worry about it consuming space unless you want to save it (DVR can do that, I suppose). And you get faster access in case you don't have a DVR set up (since they're only in about 27% of American households), or don't have access to the channel (being a cable cutter or not having cable).
And while the 3.5" screen isn't optimal for watching everything, it can certainly occupy a kid for a half hour of blissful peace. Or my 9.7" iPad, or 15" laptop, all considerably easier to carry than my TV. Or my 24" screen, or 42" TV, if I feel like streaming it (or hooking up said iPad).
The simple fact is the season pass is no different than buying a DVD box set, except you get it quicker and don't have to deal with sitting it on a shelf. Different people strokes for different folks. Deco, it turns out, there are other types of consumers in the world. The vast majority of people fit into that category. Next time, I suggest using the back button instead of just showing up to troll in a thread.
You know, if I see links to Brickshelf, more often than not, the first thing I click is the "Back" button.