He's not wrong, but the right way to make this argument is in terms of Shannon's information theory. You don't need to resort to philosophical mumbo jumbo, as Wittgenstein did. And Wittgenstein actually had no excuse because Shannon published while Wittgenstein was still alive.

This is the difference between the Wittgensteins and the Dennetts and Maudlins of the world. Wittgenstein just seems to be profoundly ignorant of science and how it applies to philosophical questions, while Dennett and Maudlin are really scientists first and philosophers second. Their work is chock full of references to actual scientific studies. Maudlin probably knows more about quantum physics than many physicists.

>Wittgenstein just seems to be profoundly ignorant of science and how it applies to philosophical questions

??? If anything his criticism of his own work was that it was excessively represented language as being the kind of language used by the natural sciences, which was a narrow slice of the full breadth of possible ways language can be used to convey meaning. The very thing that makes his career so fascinating is that he was purely an engineering bro, who cared more about math and logic, and he brought that perspective into philosophy, and challenged philosophy as being nonsense when measured against the standards of the hard sciences. That's essentially what the Tractatus is, and also the reason why it was retrospectively regarded as dogmatic.

Shannon's information theory is brilliant, but born out of an interest in formalisms related information transmission, and while it can be treated like it's in conversation with theories of semantic meaning, I don't think it was ever considered a specific repudiation of any particular approach. There was a whole century's worth of "ordinary language" philosophy in the anglo world guilty of much graver offenses in regarding uncritical assumptions about ordinary language as some kind of conceptual or informational bedrock, and the ways you apply Shannon to any of that, while I think you can, are non-obvious.

> And Wittgenstein actually had no excuse because Shannon published while Wittgenstein was still alive.

Tractatus came out something like 20 years before information theory, and by the time it was published he had already taken his late career "turn" to self criticism, but again, I don't think anyone treated Shannon like it was any specific commentary on his philosophy, the topics are rather remote and while they can "speak to" one another in a sense, a lot depends on how you build out your conceptual bridge between the two topics.

Information-theoretical arguments are powerful, but they're not the only worthwhile approaches. You can't use an information-theoretic argument to teach someone information theory, and they'll find it easier to grok the consequences of information theory if they have other concepts to relate it to. Having multiple different routes to a given understanding is useful.

Wittgenstein was studying the nature of language, something closer to mathematics than to physics. And he came up with these ideas no later than 1933: Shannon only published his work on information theory in 1948. That Wittgenstein's later work was validated by advances in science over a decade later suggests that "philosophical mumbo jumbo" does not characterise it well. Indeed, perhaps there's something to learn from it.