I agree that you can be 100% sincere about believing what you appear to see. So are the majority of people who report seeing or hearing ghost, seeing UFOs, feeling strange or spooky sensations in old houses and so on.
However, given how easy it is to fool the human senses - either our own through convincing ourselves we saw what we wanted to see, or fooling someone else's either deliberately (with
cold reading for example) or acidentally, I still can't agree with you about this.
During the early 90's I was a co editor/writer/publisher of an electronic magazine about UFOs and other strange phenomena. As part of that I spoke to, corresponded with or otherwise heard from many people who genuinely believed that had seen something not of this earth. In every single verifiable* case the sighting turned out to be something perfectly normal. But in every single case the person involved didn't want to hear that; they wanted to
believe and that's exactly what they did do whether anyone else believed them or not. We even had one guy who was convinced he had UFOs flying over his house each night because he'd seen the lights. What he didn't accept was that he lived on the flight path for Exeter airport!
(* Verfifiable means a sighting that is fresh enough to gather information about. This information includes weather patterns, time of year, time of day, local events such as helicopter or air balloon flights, times of laser lightshows, times and paths of local aircraft, distance to commercial or private airfields, distance to areas popular with kite flyers etc etc etc.)
The long and the short of it is I have seen far too many people who refuse to accept any other posibility for what they believe they saw, heard or felt. Add to that the total lack of scientific proof of any sort to support the claims of believers and I see no reason to change my mind.
What I do know is that no matter how many times I make logical arguments to the contrary, you and others will continue to believe. So, enjoy.