nothing doctors do is safe except maybe weigh you. MRI would be way, way down by the bottom of the safety list.
Living is dangerous.
Going undiagnosed with a potentially serious disease makes living even more dangerous.
I am not a big fan of doctors either and have not been to one in 30 years. But there are times when a doctor's intervention is required. If you had an aneurysm blow out are you going to tell the doctors not to touch you because they are dangerous as you bleed out?