In my opinion the root of the problem is that the people who have the best equipment to detect incursions in the skies are military forces, particularly the US, and their policy for decades has been to classify, dismiss and ridicule. Are they sometimes doing that to hide secret tech? Seems very likely. Are they sometimes doing it to hide something else? We don't really have a way to know.
So what makes highly-cleared people in the Intelligence Community and the DoD to make these outrageous claims? I'm talking about people like David Grusch, Karl Nell, Chris Mellon or Luis Elizondo. I don't really know, it is hard to find a parsimonious explanation.
What I don't want to do is jump to conclusions one way or another. If you look at their resumes, the people making these claims either are or have recently been in positions where it's very plausible that they would have access to this sort of information. So, let's investigate and figure out what makes them say these things. Some of them have testified in secure facilities, providing data such as the location of these alleged craft, so it would make sense to follow up and see what's in there. If there's nothing, all the better.
If there is new advanced tech, it would likely be US in origin just given the amount of money the US has spent over the last 70 years for defense. It certainly makes sense that we would compartmentalize advanced tech knowledge and it makes sense that we might test it on ourselves to gauge/control reaction to the tech rather than risk it falling into another government’s hands.
And yes, of course our government would lie about it. Why wouldn’t they?
Another counterargument you often hear is the decades-long historical record from pilots (both civilian and military), including reports of "Foo fighters" during WW2 from both sides of the conflict.
It is a muddy subject.
My understanding is that Grusch has not testified that he had direct knowledge/eyewitness/evidence to alien tech, but instead “has been told of…” from people who have. Nell simply vouches for Grusch’s integrity and adds no direct evidence right?
That said, despite all the latest publicity we don’t really know anymore now than we did before. Still zero actual evidence and honestly nothing that hasn’t already been out there for decades: “blue beret” crash retrieval units, Colonel Corso, Lazar, Jesse Marcel. All we have that is different is a person willing to testify to congress that he heard some rumors and a congress willing to hear it.