While curious, I remain skeptical given the deception out there.
The truth remains elusive at best.
Occam's razor strongly mitigates against belief that UFOs are occasioned by visitors from other worlds. The easiest person in the world to fool is yourself, partially because you believe yourself too easily.
The number of reasons folk might fervently believe that an experience was a visit from outer space are too many to enumerate here. I am convinced such people are generally sincere, but mistaken. There are a few unscrupulous conmen out there, as well.