When the doctor visits a critically ill man, just before his time has come, he tells his family/wife/husband "Ab inhe dawa ki nahin, dua ki zaroorat hai". Taking a cue from his, Rajesh Khanna took his kid to Vaishno Devi and that worked for him. Amitabh Bachchan went to a temple and that worked for him, just like the countless acts of faith by countless actors that saved the life of the sick and dying.
However, they have been doing it wrong all these years. Yeah, I agree that it worked and the sick indeed healed, but this is not what we can say "the doctor ordered". What the doctor has been prescribing all these years was this.