Assuming someone sleeps 8 hours a night and spends 100% of their 40 hour a week job in front of a computer and no other time in front of a screen, that's about

Assuming someone sleeps 8 hours a night and spends 100% of their 40 hour a week job in front of a computer and no other time in front of a screen, that's about 36% of an adult's waking hours. My total screen time is higher than that, but that's largely my fault (although I do work 50+ hours a few weeks out of the year). If you work in tech your going to spend a lot of time in front of screens, likewise fishing guides spend a lot of time staring at water.