It matters, in the sense that other people (some of them with control of a great deal of wealth and force) believe it, and make decisions based on it.
I'm confident there were plenty of citizens of the Soviet Union who knew that Lysenko was decoupled from reality. That didn't stop them from starving to death.
Believing AI is bonkers to me. But these shields been up since the 90s. None of this stuff matters. It was all gibberish