A lot of code is "useless" only in the sense that no one wants to buy it and it will never find its way into an end user product. On the other hand, that same code might have enormous value for education, research, planning, exploration, simulation, testing, and so on. Being able to generate reams of "useless" code is a highly desirable future.

Obviously "useful" doesn't just involve making money. Code that will be used for education and all of these things is clearly not useless.

But let's be honest to ourselves, the sort of useless code the GP meant will never ever be used for any of that. The code will never leave their personal storage. In that sense it's about as valuable for the society at large as the combined exabytes of GenAI smut that people have been filling their drives with by running their 4090s 24/7.