I think that every single response from an AI is a liability on the company's part. This is unlike an internet search where it is only displaying links but LLMs are basically synthesizing new contents. If they want to claim that what their AI produces is not merely a derivative of their inputs then I say let them have it (in order to not pay those that the AI gets its information from).
Thus, if they do suggest submerging your kid under water for 5 minutes to cure their headache, then such recommendation necessarily comes from the company that provides them. And they should be liable for such posts; just like how every other company would if one of their employee ever suggests such a thing.