Not sure I understand your point. Like dWAR, I doubt that any GM uses "Total Zone or UZR or Statcast data as the sole, indisputable measure of a player's skills."
But there are plenty of fans who find WAR or dWAR to be discussion ending, with no nuance accepted. In other words, many use WAR or dWAR as "the sole, indisputable measure of a player's skills." That's not only dull and unintellectual, but foolish.