No, that’s the hyperbolic reaction clickbait wants from you.
Not all rare books are valuable. Someone’s self-published junk sitting in the garage is NOT analogous to the library of Alexandria.
Many, most, maybe all of these “rare” books are being scanned instead of just being recycled.
Not a big Reddit fan but there was a great post there from someone in the book industry talking about how non-industry people often give this great moral weight to ever book in a way that is totally disconnected from reality.
If they have no value why are they being acquired and scanned?
I don’t think any of these people know.
All I’ve read, as far as sources go, is a number of rare book sellers saying they’ve had a big uptick in huge orders with no price haggling. Apparently that’s peculiar. And some of them seemed a little concerned.
Now I’m certain they’re not chopping up Davincis notebooks, but I’m not certain there aren’t some that would make people wince.
And I don’t have any reason to think some reddit librarian knows what’s going on, if anything, either way.