You and many others have brought up this same strawman over and over again. My actual position is that there's a spectrum of confidence, but that i'm not actually certain about anything.
And whats your position exactly? That all personal experience, no matter what it is, should just be accepted without skepticism or doubt and that we should accept any claim in a personal revelation? What if someone was high on mushrooms and cocaine or had a head injury? I'm pretty sure you hold the same position I do--that not all personal experiences or revelations should have the same confidence. The personal experience that I have a pet dog is vastly different from a personal experience that I was abducted by little green men wearing tutus. I'm going to doubt personal experience and revelation depending on what it is, particularly the content of that experience. Just because I had an experience doesn't mean I should just automatically accept the claims of some voices im hearing in that experience/revelation.
First, I don't completely disagree with you. People can and are often deceived or tricked or fall into wishfull thinking. But I also believe in legitimate revelation from God. I believe that God is capable of revealing himself in ways that provide the same level of certainty to the receiver as one gets from seeing, touching, hearing, smelling, and/or tasting. Certainly if there is a God (which I believe) he has the power to communicate in ways, that while not understood to mere mortals, actually surpass the pedestrian human senses. That means of revelation can and does leave a sure impression on the soul that can equal or surpass any level of certainty obtained in any other way regarding any other fact.
Having said that, there is always that nagging "What if everything I experience of a physical or spiritual nature is a hallucination?" Or, "how do I know that I even exist?" Or, "what if everything I experience from God is real, but coming from a deceitful source who is playing a game or has some unknown motive?" I suppose there is no way to be 100% certain of anything if you look at it that way.
So, I have to assume that what I see and touch is real. The world is real. You and I exist. There is stuff and living things all around and I am a part of that. I bet on the fact that there is no intelligent deceiver who pretends to be God and who is communicating to people on earth. I take on faith that the very real experiences which I have, are real, that the love I feel from God is real, and the whisperings of his Spirit are real. They have proven to be so, in my mind and heart. I'm not sure I could stop believing in God. I could perhaps walk away from God and ignore him or forget him. But the impressions I have are too deep for me to ever really stop believing that he exists.