I don't think anyone would want to bet on sports they aren't even familiar with. Think about it like this, if you bet on sports like american foot ball. That game is actually complicated if you don't even know how it works. Even soccer might be difficult if you don't even get it. Heck, even basketball will be hard to bet on if you don't even know how it works.
I know right, others are saying that they will, if, there would be a good tipster, and this is ridiculous, because the one who is gambling is not you, but the "tipster" because he decides on where, what, are you going to put your bet, and no one would do that because it is your money, and what if that "tipster" lost all your money, you can't blame him because you are the one who insist to do so.
What I am trying to say is that, it is better if we are the one who will handle our money, on where we are going to use it, because even if we lost it all on gambling let's say, then we have no regrets because the one who is responsible is our own selves, no one else, and it is easier to accept, so it is 100% true that you SHOULD know the game, the rules and regulations, before you put your bet, for you not to be fooled by someone.