Not all healing's are fake or should assumed to be fake by default, but allot are. This much is confirmed if we want to be dogmatic about it...
Mark 16:17-18Authorized (King James) Version (AKJV)
17 And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues; 18 they shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover.
John 10:36-38Authorized (King James) Version (AKJV)
36 say ye of him, whom the Father hath sanctified, and sent into the world, Thou blasphemest; because I said, I am the Son of God? 37 If I do not the works of my Father, believe me not. 38 But if I do, though ye believe not me, believe the works: that ye may know, and believe, that the Father is in me, and I in him.
It is Gods revealed will to bring healing.
Matthew 13:15Authorized (King James) Version (AKJV)
15 for this people’s heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with theireyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.
Prov 15:7 The lips of the wise disperse knowledge: but the heart of the foolish doeth not so.