Maybe one of the reasons is that buying software in general case is more complicated. Kebab around the corner does not ask you for credit card details, delivery address, probably will not want to track what you will be doing while digesting the kebab etc… In contrast buying a CD in 90’s was more like buying a food, but the price usually was too high. That grown into huge pirate software markets, like in eastern Europe. To extents like the other commenter said - “nobody ever will pay for software”.