I agree with these thoughts, Susan.
And I think there is more to it - some kind of regulations, procedures maybe.
Talking about rules, I believe there are some conditions to be fulfilled, before someone ventures out. And I'm not talking about our
procedures (relax, trance), but of something more deep, regarding our higher self.

Therefore, even if projection can be available to everyone, not everyone is able to do it - at a certain moment. There are forces that watch us (even called Watchers in some ancient texts), and these forces allow (or not) some experiences.