Another ignorant reply.
Like I have said repeatedly and is a fact of life. Nothing is ever perfect, meaning that if you look for something to support your view, you will always find something.
Life is all about probabilities and going with them or against them. As a stock market analyst that I am, I always bet on the probable outcome and not the longshot outcome. Will I always be right? No, because the longshots sometimes win (like the lottery). Nonetheless and in the long run, you will end up a winner if you go with the probabilities and not with the longshots.
The OP is not about one (or just a few) but the majority of famous and well-known people favoring one outcome. Can one be assured that the outcome will be what they believe? No, but unless you like playing the longshot, you will LIKELY end up a loser. There is a very short list (like with Rogan) favoring the longshot, compared with the other side.
One additional thing to consider. Betting on a longshot can be done without losing being all that painful, given that if you are not betting it all on the longshot, even if you lose you can still survive and prosper later on.
In Trump's case, we are betting it ALL. It is a total win or lose proposition and betting on the longshot means we all likely to lose it all.