Highly recommend playing the game, even if not a fan of video games. It's wonderfully written and doesn't require a large time commitment. It's also devoid mechanical checks.
I have a mental list of video games that i could use to justify to my dad that video games are not a mindless waste of time. The Stanley Parable is on that list.
I would be careful about using The Stanley Parable for that specific purpose, because it is one of the easiest targets for "mindless waste of time" classification.
Don't get me wrong, I totally like it, but the whole "game" can be described as "do a bunch of actions, pick some different doors every time, and then restart it all over again, except it might be slightly different, but you are still just choosing which doors to walk through, while listening to some voice".
Note: I didn't "beat" the game (assuming there is some actual ending), but I spent a good couple of hours on it.
I loved the Stanley Parable but it seemed to me entirely written for gamers so I'm curious what a non-gamer would get out of it. Much of the dialog is about the experience of being a gamer.
https://thestanleyparable.fandom.com/wiki/Dialogue