I don't like being on camera and I'd wager many (if not most) people don't. We do it because we have to, not because we want to.
And I don't have to because I don't work with clients or take roles in which me being on camera for more than 5 minutes during the entire duration of the role is a requirement.
Between voice and screen sharing, we can handle all business without monitoring each other's 2-dimensional faces.