If every market has a moat, then saying that a particular market has a moat is a statement without meaning. The OP was probably not trying to make a meaningless statement, therefore the OP was probably saying that LLM's don't have an abnormally effective moat.

I agree, LLM's don't have an abnormally effective moat, just the standard moat most mature markets have due to market complexity. IOW, LLM's will likely end up with the standard oligopoly most modern western markets end up in, which have minor but relatively ineffective pricing power.