taking photos of an operation during procedure is highly unprofessional and unethical. Doctors do take pictures of a surgery but for case records and not to post on FB to gather likes.. 

btw the google search link you posted are mostly stock photographs where actors dressed up as doctors are acting in a set so they can sell the copyrighted images for websites and magazines..

thus.. I think taking photos under safe and sterile condition is OK only if done for medical records but to post on FB for likes is not..