Idk why. Well, I do know why: I grew up in an era where Flash games started to do physics-based gameplay, and something about that just made them endlessly replayable and easy to do while focusing on something else like a lecture or whatever.
So many games these days demand your full attention. And that’s great, when you have time for it. But if I just have 45 minutes to derp around while I catch up with friends on Discord, I can’t dive into an epic boss fight that I was prepping for a month ago.
I take it from your exasperation that you want a game to “just be good already”, from the very start. So I’ll exclude anything that takes too much thought or investment to start having a good time.