Not if you’re claiming that the spells, once cast, automatically get exponentially spellier until they awaken into a spell god, capable of literally anything, including casting more complicated spells than any wizard is capable of. If that were true, you’d have no need for wizards. The fact that wizards are still around means it’s probably bullshit.
So in your opinion AIsnd LLMs aren’t improving? They can’t do it today, therefore they never will?
Certainly has never been times in the recent past when people have confidently predicted computers could never do something that computers were then able to do shortly after the prediction was made.
What really happens is the spells only have other spells to draw from and they begin to degenerate over time, eventually turning into chaotic eldritch horrors that randomly add limbs to people or adamantly refuse to discuss goblins or just shriek in gibbering madness. Our Evil Overlord sacrifices the dreams of children to keep the magic sustained and controlled, and soon the people can't even think or speak without the help of magic. And they think they're wizards even though they can't even read a grimoire.