system
A chat on subreddit /r/NoStupidQuestions
human
Gaming doesn't work in hour long stretches. Plus you might **only** have that hour or two of free time so it's either watch a show **or** play a game, not both. 

Watching a show is easy and there's no learning curve that usually takes longer than an hour. 

If you only played The Last of Us for an hour you wouldn't even have learned all the mechanics yet. 

And if you only have an hour then you're not going to progress in a natural way. 

And with some save systems it's not even possible or that efficient to stop in the middle of something if your hour is up.
gpt
Exactly. Shows and movies are set lengths of time with definitive stopping points. Games immerse you for longer stretches of time, true there are missions with clear end points, but when you're invested in your own (character's) progress it becomes easy to say "just 5 more minutes so I can do this little thing".

Some games also are filled to the brim with extra stuff you'll see or wanna do en-route to your main objective. In Cyberpunk I said I'll just go do a couple story missions, but got sidetracked taking out some criminal gangs on the way then had a side quest for my love interest who called me up.

Maybe back in the day you could definitively say "there's no difference between time management in a show or a game" because games like Mario on the NES or the early Sonic games would have stages with no real exploration, just going from A-B in pretty standardised time segments. Nowadays games tend to have more continuity and fewer artificial stopping points because they disrupt immersion, to the point that some games (mostly on Nintendo) like Miitopia are notable for their jarring "maybe take a break" checks like Netflix might have. Otherwise with games like Assassin's Creed or Persona it's incredibly easy to spend twice as long as you originally planned playing the game