I'm pretty sure the schedule for the following season (13-14) is being planned while the previous season (12-13) is still in play. It could be that certain match ups were scheduled before Kobe's injury, or regardless of Kobe's injury.
On top of that, travel accommodations, arena closures for other events, and the fact that we're the Lakers dictates more than our team's health/roster. The Lakers still have a s*** ton more fans than other teams, even when crappy.
To top it off, a back-to-back against bottom half playoff teams in the west isn't that bad. If we had to play the Thunder and Rockets back-to-back, I'd be more pissed. All NBA teams play back-to-backs. Plus it's the beginning of the season so legs are fresh, and we still have Steve Nash, Gasol, and the Laker brand.