The two views have their own benefits and shortcomings. It is clear that we all have the same amount of time in a day, and the time amount that one decided to devote into a specific topic could much determine how professional they would become. As a consequence, if you invest all the time into one category, there is no doubt you will exceed most of the other, but it also means that you can only experts in the one and only topic. While on the other perspective, which we allocate our time into few subjects, there are less chance to become elites in any category, yet you can obtain knowledges from each criteria.