In the Phaedo, just before Socrates' death, Crito asks him how he would like to be interred. Socrates objects to Crito's confusion between Socrates the person -- the soul that will shortly be departing -- and whatever will be left over as the corpse.

Scientific discoveries aside, I can see this sort of art coming back. This kind of tattooos is hauntingly attractive, a postcard from another world.

A dead person is dead and doesn't care anymore. The morbid taboo of not studying dead bodies lead to a looong stagnation in medicine.

Now in terms of practical gains not on the same level, true, but same principle to me.