Why nobody cares about David Grusch’s UFO revelations?

Because it is, so far, just hearsay with no physical evidence.

It's a curious moment: the US military has recently been more transparent about UAP, including releasing videos. NASA has a permanent body investigating UAP reports. And some seemingly serious people make seemingly serious claims about stuff other people have said exists.

It seems to me that official bodies are treating these reports with more public seriousness than they have in the past.

But, thus far, none of the reports or "evidence" is at all compelling.

And, in a general social climate of distrust of political authority, distrust of scientific processes, and general conspiratorial thinking, these claims must be treated with skepticism.

I look forward to seeing comprehensive, repeatable, multi-national analysis of previously unknown materials. Until then ... pfffft.

Lack of proof.

This isn’t really all that new. Prominent people before have made UFO claims.

Former Canadian Minister of Defence claimed that aliens had visited Earth from Mars, Venus, and a Saturn moon.

https://en.m.wikipedia.org/wiki/Paul_Hellyer

We have been hearing about UFO's for 70+ years. Every few years there's a great stir about how the government has been hiding evidence of extra terrestrial life only to be proved as lies or fraud later. There was a time that the government encouraged the rumors as a way to hide top secret avionic research so they had a reason to make sure it continued.

Bottom line, we have zero credible evidence of extra terrestrial visitations. Think about this, we have billions of people using phones with cameras. Yet we don't even have a credible photo that we can show as real evidence.

Science fiction has burned the idea of ET's into our collective minds so much that most of us are convinced that there must be extra-terrestrial life among us.

There was a time when people thought elves and fairies were 100% real. Ok, now switch ET's for them.

because there is no concrete evidence. It's not credible, and just speculation at this point.

We've seen this before, and we'll see it again. If you want to convince people that aliens exist, you need to show evidence.

Evidence, Evidence, Evidence

Because words, whether spoken or written, are not evidence.

Our greatest flaw, as a species, is failing to recognize this.

The perpetual narrative is, "He is a respected man; he has no reason to lie; he is putting his reputation on the line to do this." Those things fail to convert words into evidence.

Evidence begins with data. Very specific details. Drawings, measurements, logs, times and dates. These are all missing. If those were present, we could begin to follow the trail towards evidence.

But, apparently, most of us are not wired that way.

His claims are all on behalf of “witnesses” he interviewed.

I don’t believe any organization of more than a single person could keep a secret as big as physical samples of alien spacecraft or bodies secret for more than a few minutes, let alone decades.

Because all aliens always land in the USA.