That paradox is this: any nation (or organization) that possesses the technology to do what the UAPs are reported to do would have in its hands such power, such force, such a threat that no one could oppose it. Yet we see no evidence of any nation wielding such power, an inaction that would be highly implausible were they to have it.
The whole thing is a conundrum wrapped in an enigma floating in mystery and secrecy.
/s
Seriously, I have no explanation for it. Furthermore, with all the focus on space how/why do we see them here and not there?
They could still be in the testing phase. Testing both the technology and testing adversarys' response and defenses.