Perhaps God simply colored outside the lines(?)
I think if we took the time to think it through that we could deduce the nature of these things. For example, if not even information can travel faster than light, then any "aliens" should be from this planet. If, with our current tech, we cannot see them on land, and given that 75% of Earth is covered in water ...
Regarding "UFO crashes", in a world where human vehicles are starting to safely drive without drivers, how likely is it that an advanced species would experience crashes of their higher-tech vehicles and devices?
Finally, they must be friendly towards humanity, otherwise they would have already released their own virus into a "wet market" in China.
What if these so-called ‘crashes’ aren’t accidents at all, but Trojan-horse craft—planted to make us believe we’re dealing with extraterrestrials, when the real truth may be something very different?
UFOs/UAPs are galactic civilization’s equivalent of juvenile delinquents, joyriding through this backwater laughing-stock of the universe. Temporary abductions, (air) traffic stunts and physical probes sounds too much like irresponsible teenage hooliganism to me.