You have to remember ancient people had about .000001% of a modern human's general knowledge and visual references when describing their experiences. Also there was no eye doctor so by adulthood a lot of people had untreated visual issues. Look at how ancient descriptions of manatees somehow became beautiful women with fins. Read descriptions of elephants by Romans seeing them for the first time thinking they were stone monsters. And that's all assuming people are sober and in reasonably good mental health.
Ancient accounts of 'UFOs' are no different than ancient accounts of angels or demons. There's reasonable evidence that they are descriptions of known phenomenon and zero evidence that they are paranormal.