“This website has links to a lot of information about trace cases ...”
Interesting site. That’s a lot of incidents and a lot of reporting.
Today’s world is filled with cameras. More detailed pictures of the spacecraft or their occupants are bound to come if those things truly exist.
My experience is that when when seeing something really surprising, especially if it seems very illogical, people often don’t even think of taking a picture. I’m sure some do, but for a lot of people the mind just doesn’t go there.