Gambling experts are not true expert because gambling is luck, there is no expert that can come out and prove how many times they gamble without losing money, it's either they hide their losses or they are lying using a special gambling software to deceive people, in the end they always have many followers.
Follow your own strategy, the only painful mistake you can do is risking too much money or even little amount that you are not ready to lose, predictions are mere predictions, always remember this.
Gambling experts can also make mistakes in their analysis because they may miss one or more important pieces of information. We can also make mistakes in analyzing, but if we can analyze with our skills, we will get more clues.
Maybe he wants to get more followers so he can get other benefits. But we also shouldn't pin too much hope on people like that because that will make us too lazy to analyze and wait for the predictions.