I think that is nothing strange here, because you most likely live in a small town where nothing happens. In big cities, people are not used to keeping secrets for a long time))
Of course this is the law of mankind. People determine when they share their secrets. Depending on the circumstances in which they live. People are still herd creatures
Keeping secrets isn't about the place you live in, it is a personal trait that you either have or you don't and depending on circumstances whether you can keep it or not.