Muffled
Jesus in me
Well priests can do it, so I don't see it would be a huge issue. But you are right about the superstition. Catholicism, being sacramental, still has a fair amount of it. Protestantism has less, though there are a lot of charlatans practising faith healing etc. which is in some ways worse.
I believe faith healing works even if the person is a charlatan. Belief is not as easy as it sounds though and some people are faith killers ie they say things to take away a person's faith.