You're making the assumption that there is no value in the development itself. Tackling unique problems can be invaluable to building skills, can be a lot of fu

You're making the assumption that there is no value in the development itself. Tackling unique problems can be invaluable to building skills, can be a lot of fun, and can be relaxing. All of those things can be extremely valuable uses of one's time, even if you assume that the product itself had absolutely zero value to anyone.