I love sports, but I admit, I'm too lazy. When I study bets on just one sport, especially a popular one like football, I don't get any more motivated or inspired. I like different sports, including uncommon, exotic, or those with complex rules. Although for me, even baseball is a game with complex and strange rules. I could say the same about handball, water polo, and horse polo, but if you think about it, horse polo has a lot of its own specifics related to horse control and the inconvenience of working with the ball, because you have to do many things at once. And the rules of such sports probably reflect many of these factors.
In short, I have adopted a formula for myself that your thinking as a bettor will develop when you study different sports and compare them with each other. Do you think this development really happens? If so, how does it manifest itself?
maybe it works for you, but it looks that you've study a sport for betting because I believe that if you're into that sports or you really love that sports, focusing on that specific sports can also grow yourself. It's like the master of all trades but sometimes it's like professionalism that's working with one mastery only. It might work on you for general knowledge, but some sports really need team analysis and of course need to study the team compositions and the level of the roster, you really need a good knowledge in order to have a better understanding on the sports.
If you're targeting a general knowledge, you can even get those if you have a mastery of one. Or maybe watch some Olympics to witness how the play and implementation of rules but watching a lot of sports is exhausting and it's going to be hard to commit in one sport.