AI will augment procedures and perhaps help with triage and histories and other systematic and administrative tasks. But it's not intelligent enough to replace a human doctor, and it has no soul and no body. It can't provide the social component of healthcare, and has no intuition, which is also why it can't replace human psychologists & social workers. Additionally, there is the issue of liability if the AI makes errors.
As with other fields, AI will not replace, but assist current doctors. It could be a good tool to diagnose deseases, but always double checked by human doctors.
No. We will still have to make our own decisions and exist, and AI is overblown at the current time, simply because humans have no idea what to really expect.
AI is advanced computational capacity, nothing else.