I consider it normal to not work on side projects. How many other industries consider it normal to work 40 - 50 hours a week and then your "free" time working o

I consider it normal to not work on side projects. How many other industries consider it normal to work 40 - 50 hours a week and then your "free" time working on other projects? Everyone I know clocks out and does something completely unrelated to their work in the off hours.