“Most of the others were the result of innocuous encounters with common objects such as balloons or microwave ovens.” Microwave ovens? FLYING microwave ovens??? is this a typological error? Please explain how microwave ovens get launched and more than that maintain some sort of flight trajectory?
As for UAP, well to quote Robert McNamara “we don’t know what we don’t know”. And that will always be true, even in a finite universe.