My personal assumption has been that 'pleasure', at least partially, includes expected practical returns. I'd also guess that's at least partially true for kids

My personal assumption has been that 'pleasure', at least partially, includes expected practical returns. I'd also guess that's at least partially true for kids: "my parents told me if I read a lot, I'll be smart when I grow up", etc. We generally worry less if we see utility in it, and if we have people to share our hobby with. I think it's reasonable to say there's few hobbies out there without real world utility.