Primarily, it's just because game consoles are not general purpose computing devices, customers don't expect that kind of software support in the first place. But even if we wanted to change that, the consoles are all priced around this lock in. Generally speaking, consoles are sold at a loss during their first few years in production, under the assumption they will make money on software sales. If you no longer have to buy software the manufacturer gets a cut of, it no longer makes sense to subsidize the cost of the hardware. If this were to change, consoles would have to be more expensive in general. This is not the case in the smartphone market, Apple is making healthy profits on every iPhone sold.