Well I think generally there are very high number of people who watch sports and who are either a fan of one club or the other.
Anyone who truly watches football and follows matches would find it very easy to predict matches or even tell about his club or others, so most times when there is now an opportunity to predict to win, it is easy to get many willing to make cash commitment to make prediction.
This is the main reason why I think many would always pick interest in sport betting. As long as anyone fine football interesting, involving in its betting or gambling becomes very easy.
Yes i agree with you. Those are precisely the reasons why it is so profitable for some people to do those kind of bets. I think that the same goes with horses.
The outcome could be with some degree of precision depending on the person predicted. Of course some of too dumb to even win in those kind of things but at the end it is incredibly easy to do so when someone wants to improve in it and have a certain level of understanding. Not everybody can do it.
That is the why, i personally don't like those things. They are too easy.