You adopted a formula? How come when you said you are lazy?
Do you think this development really happens?
See? You even said that.
But there is no formula needed here because it is just common sense that if we venture a lot of things, that also increases our knowledge. If we have a limited capital, comparing and deciding if which one is worth it make sense but if ever we have more, we can just add more games. This increases our potential earnings. It doesn't manifest it self but we people are the ones that manifests it.
By the way, you are still not lazy at all because you also said that you study one sport. That is already better than nothing at all but you are always welcome to explore others if motivation suddenly creeps in you.