Yeah, I could never put my finger on why I didn't like it before, but then I saw this video and everything made a lot more sense.
Although, with the recent AI boom I could see this process improving a lot (such as what DLSS is doing)... but I would still want an artist in the loop for movies/shows making it look just right, rather than my TV trying to guess how characters should move around between frames.
I kinda like motion smoothing, especially when there is a setting that allows you to adjust it and not just a toggle between vaseline and off. A lil bit goes a long way, but I do think it's a good feature!