I'm not trying to argue that people who prefer a particular behaviour are wrong, just to point out why it's a valid technical choice. You may find it pretty rar

I'm not trying to argue that people who prefer a particular behaviour are wrong, just to point out why it's a valid technical choice. You may find it pretty rare that you have a document that compresses the scroll bar that badly, but there are billions of computer users in the world. An interface that's usable by everyone may be the proverbial least common denominator, but at least in this case, it is the least dysfunctional.