There's nothing stopping a competitive gamer from having a job or family. You also don't need to play 10 hours a day to remain competitive.
If you sleep 7 hours a day and work 40 hours a week there's still 9 hours a day to do whatever you want and free weekends assuming you work a typical 9-5 job which might be common but certainly isn't what everyone does.
How you choose to spend those remaining 9-10 hours a day is up to you. Some people would rather watch TV for 3 hours a night and sleep more so they lose almost half their free time because they enjoy sleeping in and watching some shows. Nothing wrong with that but not everyone spends their time doing that.
If you sleep 7 hours a day and work 40 hours a week there's still 9 hours a day to do whatever you want and free weekends assuming you work a typical 9-5 job which might be common but certainly isn't what everyone does.
How you choose to spend those remaining 9-10 hours a day is up to you. Some people would rather watch TV for 3 hours a night and sleep more so they lose almost half their free time because they enjoy sleeping in and watching some shows. Nothing wrong with that but not everyone spends their time doing that.