I don't think anyone thinks that really. One could argue if he could've made adjustments had he not got tagged hard early but either way he was thoroughly dominated. The question is whether he has enough time to make the needed adjustments to win the rematch or even worse for him, if his style will lose to TJ 9/10 times.
Nope. Nor do I believe the knockdown in the first caused him to lose the fight. TJ was getting the better of him before that. I don't get why it's so hard to believe that Barao isn't untouchable for a lot of people. Wineland gave him trouble by using heavy feints and movement in the first round of their bout.