As a kid I have lived in a nice little town surrounded by mountains. I spent lots of time “outside” and I have seen many UFO’s. BTW UFO = unidentified flying object. In other words I have seen many strange flying objects which I couldn’t identify. Could it be aliens? Sure, but it could be literally ANYTHING. As a kid I had many strange dreams, where I e.g. woke up during the night in a strange place and strange little grey “doctors” were “treating” me - it happened so often that I learned a trick how to “get out” (opening my eyes extremely wide open and staring at the ceiling while concentrating on me wanting to be in my room). Does it mean I used to be regularly abducted by aliens? That’s the same thing like with the UFOs - it could be ANYTHING, maybe even nightmares caused by the junk food I ate that day.
That’s my biggest problems with things like UFOs or alien encounters - while they do make interesting stories, all of these things can be explained in many different ways. I haven’t seen anything, any “proof” where “aliens did it” would be the only possible explanation.