It's a problem because reality actually matters. We do not personally determine what we experience as God or not God, we are personally responsible for what we THINK we experience, just as we are personally responsible for claims we make about Bigfoot, angels, leprechauns and unicorns. What we experience matters and it represents something on the "reality scale". If you think that it doesn't make a bit of difference what people claim, you're just wrong. The metaphorical drunk doesn't really see pink elephants and it would be foolish to let them think they do. We don't think that the crazy guy on the street corner is really talking to someone else that we just can't see, we seek to get him help because there is something wrong with him. We don't get to define reality as we see fit, especially if we're going to take those definitions out and try to convince others that they are true without any validation whatsoever.
Still not telling me what the problem is, other than you don't like it. I can define reality as I see fit. That's what people do. A definition is not reality. It's just a definition. Someone has to come up with them.
You and the religious folks want to fight over who gets to define reality. Ok, don't see how that changes anything.
Personally I define reality for a lot of people. Because, I don't know, someone needs to. It's a matter of convenience/agreement. I'd happily let someone define it but they don't want to accept the responsibility I suppose. So they let others define it for them.
That's sort of the problem, *YOU* shouldn't accept the non-validated testimony of your personal experiences either! You have no reason whatsoever to take those thoughts seriously. You have no way to verify them, you are just making internal assertions that you cannot test in any rational way. You might be entitled to your own beliefs, nobody has any way of stopping whatever thoughts you have going on in your head, but you are not entitled to your own reality. The second you open your mouth, your beliefs are subject to being challenged and people have an obligation to point out how utterly unsupported they are, even in your own head.
Sorry, can't go about validating everything I've experienced. Even what can be validated is limited. You get to some point and decide for yourself your are satisfied enough. It's never 100%. Other people are lazy, ok I don't want to say lazy, but don't care enough or would whether believe what they are told because it is what the want to believe anyway.
I don't have the time to validate everything I run into in life. We try to decide the important things to validate and otherwise go with what seems to work. Or in some cases whatever you can convince others to accept. People have, do and will continue to do so and get through life just fine.
As I see it, you have no more authority to define reality for me then the religious folks do. Just some egotistical need I don't have.