I wonder if the angle is...
1. People didn't believe person because person didn't have the science to provide the people.
2. People now don't believe person because of science that hasn't been provided to the people.
If that is the angle then I can kinda see the point, but I think extraordinary claims might play a key role. While science could prove the person correct, it's not the lack of science which leads people to not believe the claim in the first place.
I dunno, it's a weird one.
I'm not quite sure I follow, because I don't understand what "people" and "person" signify.
Before: "We don't trust
Kirkpatrick because nobody knows what he does."
After: "We don't trust Kirkpatrick because there's no evidence he did what he said he did."
It's a variation of the conspiracy theorist's mantra, "the government is lying to us".
If the classified AARO case files provide the evidence (as is likely), then the report is very useful. The adressees in Congress have access to those files, so we wait for their reactions.
The reason I don't trust
Grusch is that he's only claiming third-hand evidence that does not sound reliable.
The reason I don't trust
Elizondo is that he's claiming second-hand evidence, which we have sampled (the Navy videos) and found to be worthless.
The reason I don't trust
Fravor is that, while I believe he saw something first-hand, I don't think he understood what he saw (not his fault).
First-hand evidence would be someone who said, "I touched this UFO", bonus points for "... and I took this photo of it". Physical evidence would be, "come with me, I can show you the UFO that they built the house around", and it's actually there.
You can see this playing out in the report:
The "former military member" is the first-hand witness, the "interviewee" is the second-witness, and if Grusch talked to them, that makes Grusch's knowledge third-hand. It's all a big game of "telephone" at this point, with people hearing/remembering what they expect to hear.
It is clear from the report that AARO's approach is to dig down to the direct evidence, and Kirkpatrick hired the seasoned law enforcement and intelligence investigators who are capable of doing that. AARO is aided here by the legal provisions that protect anyone who talks to them, no matter what NDAs etc. they may have signed. If you saw a UFO, and lie to AARO about it, you're in trouble; if you tell them the truth, you're not.
The game of the disclosure activists is to keep banging their "don't trust the government" drum, but there's absolutely no evidence that supports the idea that the government is lying about UFOs. The underlying rationale is simply, "the government contradicts what we believe, so they must be lying to us". People have to be willing and able to examine the evidence for their own belief to break free here, and that's just hard to do.
(But you already know that, because your mate's brainwashed.
)