The context you're missing is literally the first sentence and googling "thiel question". Please put a little more effort before shooting.
Lazy web: The Thiel question is "What is something you believe and that nobody agrees with you."
It stands to reason that if you ask a crowd this question, you'll end up with a lot of out-of-whack answers (that's the whole point) and mostly false answer ("it's not that contrarian are often right, but when they're right, they're very right").
This isn't super valuable, it's just played for humor value. Each of these Thiel answers could still be interesting in its own right if the reasoning/motivation behind it was supplied.
Even if you don't agree with a contrarian statement, there's sometimes gems to be mined in the thinking that led to it.