simple
Because it is a spiritual place, and the bible deals quite well in most things spiritual, where science is restricted to just the present natural
How do you know it is a spiritual place? For that matter what is it about the bible that makes you think it is dealing with "spiritual" matters at all?
The reason many do not know, is that they are PO box bound.
You do not strike me as showing any greater capability in the area of discernment and ,in fact, you do strike me as rather confused. You make claims which you can offer no evidence for, you make claims for phenomena you cannot demonstrate, and yet you exude a confidence in your assessments that are far beyond reasonable given your arguments.
Being as you are not PO box bound perhaps you are missing out on a lot of valuable mail that could be getting through.
God does not exist until there is proof he does.