I don't think this has to do with photography at all. This is nothing to do with cameras at all. This has to do with human behavior.
There are people out there that just are not people friendly and then there are those who would love to share their experiences.
For example this forum. There are lots of people that won't go on this forum because to answer one of the beginners questions is beneath them. Then there are those that are nice enough to share their experiences with us so we can figure out what we are doing and not make the same mistakes...
Also keep in mind, these are very expensive equipment and some people would rather not take the risk of anyone else causing any damage.