Computer displays are stupid

Why did computer displays, and monitors, evolve to get wider instead of taller?

I speculate that it came from televisions, which mimicked the movie screen, and movies are landscape orientation. That said, content on the computer usually scrolls vertically, not horizontally, so it makes way more sense to have tall displays instead of wide displays.

You can rotate some monitors 90 degrees for this reason, but then you’re the d-bag in the office with a vertical monitor, and no one wants to be that guy.