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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.
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Correct, however even if a great deal of us are unable to become profitable with sport bets I see it similar to the way I see the basic strategy that is used on blackjack, the strategy itself does not allow you to become profitable but it reduces the edge the casino has over you.
So even if most of us cannot ever beat the casino at sport bets our knowledge can be more than enough to reduce the edge somewhat, which over the long run it will allow us to get more fun with our money, and that can only be a good thing.
It's not the casino we are trying to beat, it's actually other bettors. We are playing against them, and casino provides us a platform where to play, and takes some money for that.