The thing here is that some medicine doesn't really heal either. Paracetamol is just a pain suppressant, and ibuprofen partially suppresses it while accelerating blood flow and thus reducing inflammation, which is why it's used for sore throat, to avoid more friction and let the throat heal by itself.

Aleviating pain is sometimes what your body needs to start focusing on healing itself. It's not a miracle but it works when it does.

Say8ng that placebo effect doesn't heal you isn't really that revealing, plenty medicine doesn't either and that's okay, that's not their objective.