Lol! Never heard that one before. What they think is it (the Moon) will eventually leave Earth's gravitational grip completely. And when it does the Earth will begin to wobble uncontrollably on its axis. It is the Moon that helps Earth maintain its 23.5 degree tilt axis. This would of course put an end to the familiar 4 seasons. Not the singing group. They split up years ago.
I read it in a scientific book years ago (Clarke?).
It’s premise was that the Earth would eventually start pulling it back in, slowly at first, then increasing speed as it plunges back into the gravity well.
At some point, the Earth’s gravity would pull the Moon apart and it would break up into many large and small chunks, banging together, and getting smaller, until they became a RING around the Earth, just like the Jovian planets have!
Of course, some of the larger chunks would continue their fall into the Earth’s atmosphere, burn up or explode causing huge craters and massive destruction.................
But that would not happen for several hundreds of thousands of years in the future.
We could, I hope, find a way to stabilize the Moon’s orbit by then..................