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Agreed. However, the luck factor plays little role while making strategies on the sports betting.
That's more or less factual based games and you know very well whose strong, whose loose while playing the particular games. ~
Don't forget that in sports betting your knowledge is balanced by the odds, at least partially, and in most cases if you know "for sure" who's going to win, the odds for that bet will be 1.02, meaning that you have to risk $100 to win only $2 in the case of winning your bet. If you always bet like this, you need to place 50 bets to earn $100 in the end. And there's a good chance that at least once the opposite team will win within 50 bets.
Fair point, This is what makes people push to place on bet with a higher odds because sure win matches doesn’t gave them enough profit that worth it to the risk involved. Bookmaker is pretty smart to get an easy profit. In my case, I usually bet on matches that in between 1.5 to 1.8 odds to the team that I know that has a potential of winning. Bookmaker is very fair on matches that have this kind of odds because the 2 sides has no clear dominant winning factor.