There are indeed a handful of truly unidentified and truly interesting cases, but I stress that unidentified does not equate to alien spacecraft. That is an unjustified leap that far too many people are all too willing to make.
Why not? Concluding there is other life out there seems like it would be good for society. Less xenophobia. What’s the harm in that?
I have no problem with that conclusion if it is supported by evidence, but I see a lot of people jumping to that conclusion without any substantive evidence.