I think people should be fired for any reason even stupid reasons, but it’s pretty stupid to get rid of a perfectly good employee when there are so many bad employees that cause all sorts of trouble. The next employee he gets will probably file a bogus lawsuit against him and cause him all sorts of headaches.
I think the media attention from this will cost him other employees, as well as dental clients.
I have no problem with firing for any reason, so long as the employer does not then cry “foul” when more women are no longer eager to work for him when they research his name and background or when more women are no longer willing to have him for a dentist because of his foolish unwillingness to control his sexual urges in the workplace.
Choices have consequences; this particular dentist will experience a backlash.