Inspired by this post regarding moving mountains by faith.
God has told us to rely on him (Matthew 6:25-34) for all things.
Also, James 5:15 says
And the prayer of faith will make the indisposed one well, and Jehovah will raise him up. Also, if he has committed sins, it will be forgiven him.
So, since we should rely on God for all things and God will heal us, should we ever need to go to the doctor?
Similarly, since God is the source of all knowledge and wisdom, should we ever trust a doctor?