You go back and watch that game, and you'll see a total lack of any respect for Dak. Houston was often lining up an OLB on the edges essentially giving them a 5 man front and the S was often within 7 yards of the LOS. They ran run blitzes as well. The Austin interception was on first and ten (and credit to Dallas, they had the right play call), the Texans ran a run blitz leaving the middle of the field wide open. Dak just missed the pass.
Texans were willing to take risks like that all night just to make sure Elliott and the Cowboys run game never got going.