I don't think that this is true. While I can't lay out rules and you are right with that, that healing doesn't follow rules, it is neither a mysterious process that just comes and as it wants.

This sentence sounds like healing is coming just in randomness. But you can open yourself for healing and you can do something to get healed.

But understood, society is not interested that it's member can be healed, besides medical problems. And that is because our society is competitive and that means selfish.