

This isn’t recent. This has been an ongoing thing for at least 20 years (if not longer; that’s just the earliest I remember having this convo). Yes, it cleans the wound by killing things but it also fucks up the healthy tissue around the wound (see other comments for a more scientific explanation). Having some in a medical kit is useful for other activities such as diluting with water for an ear rinse, diluting with water for various mouth stuff (rinse not swallow), and some skin treatments (again, diluting first).
I assume this is Poe’s Law in action. Elon historically doesn’t understand shit about tech so the commenter is just highlighting something that’s been GA for other tools for years.