I guess second hand books, VHS's and DVD's are just piracy as well (read: no, they're not, and people comparing the re-sale of discs to piracy are just plain wrong)
If the good is a physical object, it can be resold. That's the law. Reselling books, DVDs or PS3 games is a right that everyone has. It's a perfectly sensible and long-accepted doctrine, and it's culturally ingrained. You cannot argue against the reselling of a physical good.
If you don't want your games to be resold, then you can bundle them with online activation and single-use keys in order to circumvent physical property rights.
Current console games have chosen not to do this, which means there's no reason you can't resell them.
The legal default in our society is that physical goods can be re-sold. Publishers have chosen so far to package up console games as physical goods, and thus they've chosen to give the consumer the right of resale.
Xbone is changing the medium so that this is no longer the case (the physical disc no longer represents the good, it's just a single-use ticket that you can redeem for the good).
That's fine, but it it's shaking up existing culture, so some negative reactions are to be expected.
n.b. you'll still be able to legitimately re-sell a physical xbone disc, it just won't have very much value compared to a 360/PS disc, seeing that it doesn't have as much utility (as it doesn't physically represent the game). Someone who wants it for the utility of being able to pay the license transfer fee and install the data from the disc, may still want to pay you a few dollars from your physical xbone disc