Sounds like pretty clear thinking to me, while all else is whatchamacallit, oh yeah, - speculation.
Even Project Bluebook, as it closed down, admitted that a small number of the claimed sightings couldn't explained or written off. Little green men? I doubt it.
Maybe that is why they are called UNIDENTIFED Flying Objects.
Not everything in our existence is easily explained. How much more so for the vastness of the unknown Universe?