Many people still 'work-out' at the gym while their 'real' working lives involve close to zero physical effort. Many people 'go for walks' when a motorcycle cou

Many people still 'work-out' at the gym while their 'real' working lives involve close to zero physical effort. Many people 'go for walks' when a motorcycle could have gotten there faster and with less effort. The utilitarian view of mental 'work' might shift in the same way. Deliberately opting for mental excersize not because of nescessity but for mental health and enjoyment. Just like in the physical case, there will be widespread mental obesity because many will not.