Because you can roll roll your sleeves down over tattoos and take out your nose rings and tongue studs but there's no way to hide pointed ears when you're going for an interview at Bank of America.
The ability or inability to hide body modifications for job interviews or professional situations has hardly stopped people from getting extreme piercings that aren't so easily concealed by simply removing the stud (the big hole in the skin is a dead give away) and there's not much ways to conceal facial tattoos or tatts on other exposed parts of the body.