Simply because it's possible that people can be fooled by a perceptual illusion doesn't mean that they were.
So? Nobody is saying that. If that's what you
think they're saying you are seriously misunderstanding the argument. If you do know that's not what they mean, but are dishonestly attributing that incorrect meaning to them anyway, your argument would be definitively dishonest.
In the absence of a deliberate and professional hoax, the chances of being fooled into certainty about anything is exceedingly small.
If you don't have references to some objective research that demonstrates your above comment to be true, then I think it's reasonable to accept that you just made it up. And although making stuff up might be a common practice in the pseudoscience of "ufology", it's not how rational people determine the truth about the universe we live in.
You don't want to believe that and prefer instead to think that UFO witnesses are incompetent.
Nobody is saying that. If that's what you
think they're saying you are seriously misunderstanding the argument. If you do know that's not what they mean, but are dishonestly attributing that incorrect meaning to them anyway, your argument would be definitively dishonest.
But the fact is that you are just plain wrong. Most witnesses are reasonably well informed people who can tell the difference between something natural or manmade and something out of this world.
Exactly what are the traits and characteristics of something out of this world?
Then there are highly qualified people familiar with things seen in the sky who have also seen them. Then there are even more highly trained and rigorously tested people familiar with the most advanced aircraft in the world who have also seen them.
Seen them?
Them? There are highly qualified people who have seen things they were unable to identify? Wow.
Your stubborn choice to dismiss such evidence amounts to willful ignorance.
Nobody is dismissing the fact that people have seen things they are unable to identify. But there is no way on Earth someone saying they don't know what something is can possibly be evidence that what they saw is some particular thing. Not in this world where truth and reality are directly related, as opposed to the pseudoscience of "ufology" where truth and reality are completely different and unrelated things.
By contrast, at least I can admit that it's both possible, likely and actually the case, that some number of UFO reports are the result of misidentification, hoaxes and other natural or manmade phenomena.
It's not only possible, but in all the history of humanity any unidentified flying object which was later determined to be some particular thing has pretty much
always been the result of misidentification, hoaxes, and other natural or man-made phenomena. By contrast, never in the history of humanity has any unidentified flying object later been identified as an alien craft. Not once. Ever.
Excuse? For accepting that UFOs are likely misidentification, hoaxes, and other natural or man-made phenomena? I don't think anyone needs an excuse for that. But if you mean what's our excuse for not believing that some UFOs are alien craft, it all falls back to your null hypothesis...
"All UFOs are of mundane origin."
.. and how you are apparently unable to falsify it. Falsify that and you'll have a whole lot of people who accept it. Making any progress?