I have read a ridiculous number of UFO books and I can safely say that nobody has claimed to see a UFO that looked anything like that picture.
Lol.
As the post pointed out, some people’s minds work with what they have and even with the many variables of eyesight among people, and with distance, etc and that plane does come close to many descriptions, it would look like a saucer to many and would be recognizable to none.