I'm not sure that "vertical videos" are any worse than horizontal ones, round ones, pentagonal ones, or any other layout.

I am not sure. If you classified usefulness of video by aspect ratio it might be a good correlation with landscape. With 4 by 3 being the best.

True.

Could not have said it better. The harm these apps are doing is so immense. Why form any hobby at all when you can scroll four hours of tik tok a day?