It happens quite often, that a doctor made a wrong diagnosis, because he didn't see the very rare tropical disease f.e..
Computer can make suggestions, so that the doctor don't overlook such rare diseases.
But also because of the very strong psychologic component of the most diseases (psychosomatic) a doctor, which will listen to you, will always have the basic place as a human in this business.
As i said before human interaction(i mean talking with patient, understanding the psychology of the patient etc.) is crucial. so no machine can do that(to my knowledge of course:) )
But besides that if ehealth delivers on decreasing wrong diagnosis with suggestions, that's also a plus.
Nobody said that doctors will be replaced anytime soon, this app will help doctors to diagnose, presenting a list of possible diseases to check so some diagnosis wouldn't be overlooked by some bias, sometimes patient don't know how to explain what they feel to a doctor and sometimes hide information, maybe for shame, maybe for some other reasons, but an AI helping the process will be incredibly helpful in the long run.