Opportunity cost doesn't make all decisions zero-sum. There is a quirk of human psychology that makes us believe that most things must be zero sum (i.e. that an

Opportunity cost doesn't make all decisions zero-sum. There is a quirk of human psychology that makes us believe that most things must be zero sum (i.e. that anything I do that improves something I care about must have a 'payback' at a later date and that to achieve a good outcome I must always make an equivalent sacrifice). JabavuAdams is falling for that. Although his inability to control his own violent emotional outbursts is probably going to be the more significant problem in his life.