Just because he has in the past, doesnt mean that he always will. That team is playing great defense lately, they have one of best if not the best RB in the league, hard to stop their run game, hard to keep their receivers from finding gaping holes, hard to get to and bring Lamar down, hard to stop him when he is in full flight. The team is scary regardless of their past. It don't matter much how Lamar plays because his skill positions are doing most of the work.
Take today for example... Typical MVP Lamar game. Henry can't be stopped. Lamar cant be stopped. Receivers finding gaping holes and getting a ton of YAC... even from behind the LoS. Score 30+ points on only 10 completions that only have about 66 air yards total yet get 168 yards. While the ground game gets another 250+. No QB throws to more wide open receivers than Lamar. I dont think any QB even gets the YAC as Lamar does. Sure, he could run into a defense that stops all that and makes him play from the pocket and throw tight windows all game. If that happens, Lamar will look like typical playoff Lamar. If it don't then better hope the offense puts up points and doesnt turn the ball over.