When it comes to art one thing is the refinement of technique and another is how well you convey your message assuming you have any at all and its not just decoration (Its meta-decoration!) Modern trained singers surely can sing more skillfully than old ones, digital voices can sing even better and yet some people sing really well with shitty technical voices and the world is filled with boring artists with great technique.
There are also low hanging fruits in art, and most were eaten a long time ago.