Despite enjoying clinical practice, Benedict Evans still came to a point where he felt he is not passionate enough about what he does, and as a surgeon, he realized he enjoys talking to patients more than treating them when they are under anesthesia. He went to a consulting position at McKinsey, then back to an NHS Trust to drive digital innovation and now to a VC position. 
Resources:
InHealth Ventures: https://www.inhealth.vc/
Episode recap: https://www.facesofdigitalhealth.com/blog/f093-how-does-a-doctor-become-a-vc-benedict-evans