You can exchange it... You can't tell me that if I buy a game I can't exchange it... Hell take it back to walmart.
you can exchange it for the same exact copy if damaged. you buy 3 games they take what you paid which is $120 and divide by 3 meaning the return value of each game is $40 and a new game cost $60.
they do that so you can't buy 3 games then come back a month later and exchange them for the games you really want that aren't out yet. i imagine a sale like this is a loss leader and they wanna minimize that loss.
That's your opinion. But there's a lot more going into these systems than the games you named.
that's not an opinion. there are two console generations of track record of exclusive titles to go back and look on. if you're a gamer by now you have likely developed a preference for who's style of games you like more.
as for the "lot more" you're talking about sure there are side features but these devices are game consoles. if they did everything you lump together in the lot more category and didn't play games at all most wouldn't be spending $400-$500 on them.