yeah, the simple answer would be that you don't need a doctorate to tattoo, and I would assume most tattoo shops can't exactly support an anesthesiologist financially.
Add that it would be against the Hippocratic oath for a doctor to practice medicine as part of a business that is intentionally wounding you to put ink under your skin.
Nah, cosmetic surgeons exist, and they aren't inherently violating professional ethics. Tattooing would be the same kind of elective procedure as breast implants or facelifts.
Also, the Hippocratic oath isn't what people think it is, nor is it even done on a wide basis at this point as an actual oath.
Honestly I saw that movie as a kid and I never understood how 20th Century Fox wasn't a big player in the animated film industry. I guess it's technically a disney movie, now?
Edit: ok, English is hard i confused the words as well. Asking why tattoo studios don't offer anesthesia is a valid question, euthanasia would be assisted suicide.