Comment by phendrenad2

One of the biggest pitfalls in understanding the world is interpreting everything as an absolute. If someone says "dogs have four legs", you might think "well, I saw a dog with three legs, so there's no value in the idea that dogs have four legs, and I'll conclude that if I see tracks from an animal that seems to have four legs, it's impossible to know if it's a dog or a giant centipede". It's a pernicious little quirk of our minds that we fall for this kind of thinking.

To wit. The idea that installers on Windows behaved the way I described is an interesting fact. The idea that a few installers did things in unusual ways is a much less interesting fact. Putting them on the same level robs you of the insight, and if this is a pattern then there are a lot of things you simply can't learn, because an exception could be found.