>>512484553 (OP)
“UFO” literally means Unidentified Flying Object, so if there’s a flying object people can’t recognize, it by definition is a UFO and clearly exists.
What you mean to say is “alien spaceships” don’t exist, since that’s the colloquial meaning given to UFOs most of the time and what people are referring to when they talk about UFOs.
But even in this case you’re wrong. There is a superhuman or nonhuman presence behind some of this, and it’s also tied to spiritual, supernatural, paranormal, or higher-dimensional phenomena and occurrences.
It is too complex and long-term of a phenomenon for it ALL to be explained by black budget glowie spookery and classified military tech. Although that can certainly explain at least some of it and some witnessed “UFOs”, just not all of them.
You have a mistaken sense of superiority to others over this specific belief (or disbelief) of yours. You’re too earthbound in your thinking.