Metaphors are good as a pedagogical tool for explaining topics where you're an expert and are (within reason) certain the parallel conclusion is valid. This can bridge the gap for students.

In other situations, they're a terrible argument strategy or manipulative rhetorical tactic, and the reader or listener should question every single detail if they bother to entertain it at all.

Are LLMs really like drugs that might hospitalize you? Is the government actually concerned about the well being of the people? Can you regulate LLMs as the FDA does pharmaceuticals given that they're trivially copied as files from other countries?