Because you are young or something?
I know use the 'e' effort word instead of the 'h' word, that will smooth out the universe. :-)
Whatever people do while keeping busy I think we can all stop and really do our own cost benefit analysis for any task we chase after. Just remember to keep an honest score card.
Also, no matter how many tasks we take on we learn from each and every task. It's just that stuff goes by so fast we might forget to keep score.