I would say the lesson is can we stop trying to prove him correct. I am getting a bit sick of conspiracy theories going from "that's absurd" to "oh, hey, about that, uhmm, we are actually doing that".
Sounds trivial but it is not. He actuall has said a lot of shocking and true shit way before it was public knowledge : e.g. he's been talking about epstein since way before any mainstream media was.
Recently he has been saying that the government is using methods of intravenous dmt injections to talk to interdimensional aliens in order to obtain next gen technology. Inb4 that's true. (/s)
(But only kinda /s )