I think that it, along with “spending money is free speech”, is among the biggest, naked, pro-corruption power-grabs of the last half-century. The fact that it shelters the legal “persons” from real consequences of criminal activity is just a cherry on top. I also doubt that anyone has ever seriously thought of it as true legal “personhood”, rather, just a flimsy but convenient excuse to justify said power-grab.
TL;DR - it’s a terrible, non-sensical precedent legislated from the bench by unelected, pro-corruption judges. Granting legal “personhood” to an LLM would similarly be a terrible and non-sensical precedent that would not be used to the benefit of society or any possible future artificial sentience.