I clearly explained how Foster and Tate facing a stacked box (because Andre was out) led to Rice exploding in the fourth. In case you didn't understand the first time, the reason it matters is that the Texans' success is predicated on spacing and ball control. If the best wide receiver in football is out and the two RBs face stacked boxes and they can't have longer drives, the defense has to get back out on the field. If the defense is continually tired, then the offense will wear the defense down. That's why Rice did damage in the fourth, and not the first, second, or third.
And your thoughts about the Raiders are so far off the mark that I'm not even sure if it's worth responding to. But I will because I like to explain how wrong people are when they are wrong. If you think the Raiders are still an awful team and that losing to two really bad teams is better than losing BY ONE to the Raiders, then, well, I 'm not quite sure what to say. This isn't 2006. The Raiders had up to that point Darren McFadden who we completely shut down. McFadden, as you may or may not know (probably not if you think the Raiders are a bad team) was a top two or three RB performer up that point in the year. They also have a big DL that crowds the line and forces passes to be tipped, deflected, or harder to complete otherwise. The Texans D, much like against the Ravens, forced Oakland to kick multiple long range FGs. Three out of four attempts over 50 actually. Add to that a critical error by Lawrence Vickers dropping a gimme TD and Matt Schaub not running in a TD to win on the last play of the game, and you have a situation where the Texans losing to the Raiders isn't nearly as bad as you think or are making it seem. Oh by the way, it's week 14, and the Raiders are tied for first in their division.
The Ravens, one the other hand, lost to the Seahawks. Jaguars, and Titans, and barely beat the Cardinals. The Titans are a good team but not as good as Oakland. The Texans lost to the Saints by 7 on the road (without Arian Foster) and again that was a fourth quarter story, the Raiders, and the Ravens.