To put it in computer terms : it's the same reason why we have task-specific hardware and general purpose hardware and software. The more a task reoccurs, the m

To put it in computer terms : it's the same reason why we have task-specific hardware and general purpose hardware and software. The more a task reoccurs, the more you benefit from a device dedicated to the task. And the more heterogeneous your workload is, the more you benefit from broadly defined non-specialized capabilities. In that respect, the beauty of the human brain is that it can go from one to the other depending on your habits.