You claim the volume is large but you have nothing to support that claim. I don't think that's true, based on the study I linked. If an adult can learn a langua

You claim the volume is large but you have nothing to support that claim. I don't think that's true, based on the study I linked. If an adult can learn a language in a similar amount of time as a child. Then by definition both the child and adult have the same time (which you can use as a direct proxy) for learning anything else. I don't use a specific utility function. Because it doesn't matter what utility function you use. Pursuing maximizing any utility function for the maximum amount of time and effort will in general lead the maximum return if you go about it correctly. Having a family and a career requires spending loads of time on menial task which otherwise could have been used to improve on any specific metric. And, very importantly, are mutually exclusive. You can't maximize your career and your family. Precisely for the same reason.