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Experts, pundits and analyst based their prediction on past records and present form of the team their a
prediction is never a guarantee of 100% sure game, I used to read Lawro predictions a former and renowned bbcsport Analyst despite his expertise in that field yet he is not 100% accurate same with the present bbcsport Analyst Sutton I don't rely on their pick to place a bet rather I combined their analysis with other Analyst predictions and make selections, though losses are inevitable in gambling however betting with the amount of money you can afford to lose would reduce the risk while two to three consecutive wins would cover all the losses with extra profit.
Well, even predictions made by experts using various methods and various knowledge of information regarding the team that will be bet on cannot be truly 100% accurate and guarantee victory, but they only predict according to what they know to increase confidence and opportunities in betting.
No prediction can be truly 100%, in fact I sure that technology such as AI which can provide a lot of information and is used to produce predictions will never be able to guarantee victory.
Winning results in betting, especially sports, really depend on the players in the team and of course no one can know for sure whether they will win or not because match results can always change.
Predictions are still just guesses and we know that guesses are still very risky for errors, from this it should be able to provide an understanding that it will be more satisfying if we bet with the abilities we have or, more precisely, don't rely too much on other people predictions.
I agree with you that we don't really need to use predictions made by other people, even if they are professionals or experts, but we should be able to use other people predictions as reference or consideration for some of the predictions we have.
We can study it and choose whether any of these predictions have chance of winning.
Moreover, in sports betting it is not about an expert making predictions that can win the bet but how we as gamblers can minimize losses and optimize opportunities to win, we gamble with our own money so we must always be right in making betting decisions.