Of course I admire and approve of people who use science and logic as touchstones in the understanding and explanation of the unknown. I have always tried to use this approach myself, as I have found it helpful in dealing with the ultimate realities inherent in dangerous activities such as high altitude mountaineering and race car driving.
However, for me, the picture becomes murkier when confronted by direct first person experience which doesn't fit neatly with consensus reality and mainstream undergraduate science courses. For six decades, polls have consistently shown that only 10-15% of respondents admit to have personally witnessing a UFO. So it's not easy to reconcile this experience with either science or with the direct experience of many others.
My first and by far my most intense UFO experience involved 3 generations of my family witnessing a nearby large glowing ball of light which divided itself into numerous multi-colored balls of light which performed apparently intelligently guided geometric maneuvers for an extended period of time. This display was witnessed by unrelated parties over a wide area, and took place in a rural area of the State of Washington back in the 1960's. The feeling involved was overwhelmingly that of being in the presence of a being, or beings, of far greater power than humans. I hesitate to say that the experience was a religious one, but it was akin to that. I was not religious at the time, and am not today. I do admit to a cautious view of humanity and its foibles over history. I'm Libertarian, with a healthy suspicion of authority.
Since that time, I have assiduously researched this phenomenon. I've witnessed the phenomenon on a small additional number of occasions. I've read literally hundreds of books, most garbage, and thousands of articles, again mostly garbage. My favorite authors on this subject are Jacques Vallee and John Keel.
My tentative conclusion, as stated earlier, is that these are not aliens, but a natural, native-to-Earth life-form which is not yet properly understood by science. In Australia they may be known as Min min lights. In Norway they are known as Hessdalen lights. In Texas there is a phenomenon known as the Marfa lights. In North Carolina there are Brown Mountain lights. At the Yakima Indian Reservation straddling Washington's Cascade mountains, fire-watchers for decades have officially noted glowing orange balls rising from and running along ridge lines. When curious humans have approached these kinds of lights too closely, weird and disturbing psychological effects sometimes occur, including fear, paranoia, and poltergeist-type effects. Tests in University laboratory settings have shown that test subjects can experience similar hallucinogenic effects when subjected to strong magnetic fields.
