This article makes the assumption that people are not watching TV as a mental decompressor. Depending on your job and hours you may very well not have the physical and mental energy left over to engage in extreme physical and mental activity.
- Writing code unrelated to what I write at work
- Reading business books
- Exercise
- Mindfulness
- Doing math lessons on Khan Academy
- Watching TV
Arguably 3/5 of those are just as mentally taxing as what I do all day at work yet somehow I am able to recharge. I think for me it is more about changing direction than difficulty.
https://en.wikipedia.org/wiki/Ego_depletion#Reproducibility_...
I'm a high-producing programmer, and TV and video games play an essential role for me (as does exercise) to restore mental energy.