The only anchor in reality appears to be Biden suggesting that they knew how to take it out which seems like a pretty weak place to build a large story.
What I find particularly odd is that this entire thing appears to be based on a single, unnamed source "with direct knowledge of the operational planning".
But he does often rely on sources who remain anonymous: https://en.wikipedia.org/wiki/Seymour_Hersh#Use_of_anonymous...
I did find it interesting in that Wikipedia article to read that The New Yorker's editor insists on knowing the identify of all of the anonymous sources that Hersh has used when his reporting is published in that magazine. That suggests to me that while Hersh can probably be generally trusted, his work is of a higher quality when it's published in an outlet like The New Yorker, as the editor-in-chief and other staff submit it to a more rigorous internal discussion. That's in comparison to probably no internal review or discussion by Substack.
He's also, especially recently, made some very bold claims that so far have not turned out to be correct, whether because the truth just hasn't been revealed yet, or because Hersh was wrong or misled by his sources.
It's also worth noting that Hersh - as with any journalist - is only as good as his sources. If people choose to leak juicy secrets to him (not implausible!) he may end up publishing accurate stories that reveal nefarious conspiracies (which has happened). If people choose to give him lies and misinformation, he may end up publishing conspiracy theories instead. And as he keeps publishing, the odds that this will happen (if it hasn't already) keep increasing.
So I absolutely wouldn't write off any claim Hersh makes, but I wouldn't blindly believe it either. And here he is relying, by his own admission, almost entirely on a single anonymous source, giving details that can't really be independently confirmed.
Was Hersh told by someone that the US took out the pipeline? Probably! Does that mean the US did so? I'm not sure I'd seriously update my priors based on this.
But a broken clock is right twice a day and a bad journalist can break two big stories in a career of publishing lies.
If you publish all at once, others can go and verify the details. The source is protected.
If you verify pre-publication, e.g., go to the diving school in Florida and ask too many questions, you (and the source) will be under surveillance in no time.