> the same amount of energy can be expended into building new ways of curing cancer or whatever important problem That's the catch. We don't know what problems

> the same amount of energy can be expended into building new ways of curing cancer or whatever important problem That's the catch. We don't know what problems are important. We think we do, and sometimes we're right, but we've gone down dead ends too. And sometimes something that feels like a dead end turns out to be pivotal. I'd bet there's many scientists and researchers out there who had their eureka moment while their brain was disengaged during leisure time. Disconnecting and play are essential parts of discovering the important things.