In this case, I don’t think this is a “big thinker” specific issue, but a problem with all predictions in general. It’s just that we pay more attention to what is being said if it comes from someone who has the spotlights on them.
Humans are terrible at predicting the future, nobody is immune. The “most accurate” brains simply make many predictions. People forget the ones that didn’t come true and only focus on the ones that did. It’s no different than flipping a coin. Sometimes it’ll be heads, other times tails. If you consume enough information and have a general understanding of things, you are bound to make some predictions that come true simply by following trends and connecting the dots between several trends and what they may lead to.
The problem is, once in a while it’s tempting to say something outrageous for attention. Some people go wild and write books on things they read about and connect to form “original ideas”. But, none of it is original.