Sony/MS have traditionally taken a loss on console hardware. Now consider someone not connected, are they really going to spend much on games?
Pulling a number out of my arse for a second, lets say MS take a $100 loss per Durango sold. Do they really want to sell 10 million Durango's to people who'll never likely spend enough for MS to recoup that loss?
This is a real problem for MS and up until this generation, MS/Sony didn't really have any means to assess buying patterns. MS will know a hell of a lot more about offline gamers than you or I do.
So again, if MS has determined that offline gamers are not profitable, why on Earth would they be interested in dealing with them? All companies sell consoles to make profit; it's not out of the good of their hearts.