E.g. your not having skinny-dipped in my grandmother's pond does not mean the experience has never been had by anyone. You have never seen my grandmother's pond, therefore you would be well within your rights to disagree that she has a pond, or even that I have a living grandmother. That doesn't make the experience I have had any less real.I really be expected to provide all the examples of experiences you haven't had, of course. As with any human, their number far outweighs the number of experiences you have had.
Your conclusions stretch too far when you assert that your lack of sensational experiences automatically means no one has experienced what you have not experienced. You can speak to the lack of importance of God in your life. But you can't really expect to speak for everyone, it would seem presumptuous.
Again, if God is a mental agent or a "pure spirit," it follows that man cannot ever know the existence of God since existence is only perceivable or knowable by sensation. It also follows that the existence of God is completely meanings, for man can never perceive the existence of an unsensible being.