60 comes from the electrical grid - 20th century TV used the electrical grid to sync rather than forcing every TV to have a perfectly synced clock. Regions that didn't have 60Hz electrical grids used other standard framerates.

24 comes from the first "talkies" that had syncronized sound - it was the lowest framerate that sounded good. Before that, silent films were often at lower framerates to reduce the cost of film.

> If it wasn’t generally accepted, the world wouldn’t use it in well over 9 out of 10 cases.

This is driven by standardization, not any kind of human perception limit.

Doesnt matter for enjoyment of a product Vs is some sort of threshold of noticeability are very different.