Bertrand, anything that people are interested in has an extreme end somewhere. That is human nature. Prepping is literally preparing for something you have a reasonable expectation will occur. It doesn't matter what that something is (natural disaster or man made).
Some people very definitely fall at the extreme end of it. But then so do some train spotters, gym users, genre fans, car owners, and everything else.
I can also identify multiple constellations and features, enjoy watching programs about astronomy and space science and am a member of a number of astronomy forums and boards, but I don't own a telescope, I rarely buy magazines and I can't afford to travel to see good dark sky sites. Even though it's all pretty basic, I still consider myself an astronomer.
You seem extremely insistent that we aren't actually preppers, why is that?