I understand your statement, but think of grandma. She's anxious, chest pain, etc. In comes paramedic with the grim reaper on his forearm. Do you think that will help the situation? As an EMS professional we have to be able to treat all types of people and many still find tats offensive. Just like many are offended by men with long hair.
Many fast food places even only allow covered tats, 1 earing per ear, hair neat, etc.
I work with a paramedic that with his experience here at the end of nowhere is as good or better than any on this site. But he is allowed to show up with his facial piercings, tats, etc visible. You know what happens they turn to me. They talk to me. They act as if they would prefer him not be there. Yes his ability and education is beyond mine but I choose to look professional.
When I owned my own company I got many projects even though I was the higher bid because myself and my crews always dressed professionally. Some of my rivals actually were better than my company but they sent people out that had exposed tats, etc.
So my advice is don't get a tat but if you do get it where it is easily covered.