While I personally have no tattoos or piercings , having either of these does not make the person any different than any other professional. I agree that times are changing and this is a more acceptable individualization than that in the past. Each of these professionals still had to get a degree , therefore they attended a college to obtain that degree-therefore they are credentialed in whatever their profession is. My personal opinion is that I would want myself or my family to be taken care of by someone who knows what they are doing vs my caring what they look like. If you do not like the “look” of those taking care of you -change where you receive care, otherwise open your mind and understand that everyone looks different. It may be a way they dress, wear their hair , cultural wardrobe or a tattoo or piercing .