Do you know that they maybe right, because if you study your games very well you be able to know the kind of game's you book during your prediction, but the thing is that some people doesn't have that time to study games very well, because I know that what makes some people to make a negative prediction that leads to lose in the gambling, is as result of wrong prediction, so they have to watch and understand games before we can book for wining, some people predict base on assumption.
If you are good at analyzing matches, you may be unlucky once or several times, but most of your predictions will be winning. But if you make every bet relying only on guessing, then the percentage of losses can be much higher, because even good analysis does not guarantee a win, sometimes unexpected results happen, but if you are a good analyst, then most of your bets will be winning. If it is just a bet on guessing, then the percentage can be very low. It all depends on your luck, but there are not so many lucky people.
As much as I agree with you because what you have said it absolutely correct, let me also say that if we try to see things from another perspective, it's also very possible for the bettor who analyzes to also lose even more bets than the person's who bets based on guesses, why? It's simply, sports betting is a part luck and part knowledge kind or type of gambling, what this mean is that knowledge is not enough, good analysis is also not enough to guarantee constant wins with every bet placed..
Bettors who analyze games like professionals sometimes to go on a long losing streak, and during a time like this, it's very possible that the bettor who is betting based on guessed might turn out to be more luckier than the one analyzing, so in the end, winning in sports betting is not all about who does the best analysis, it's more of who is more luckier.