Given analytics growing role in managerial decisions, and how to approach the game and the game inside the game (match-ups, or how to deal with the 3 batter rule) has negated the purists objection to the DH as a serious argument. With starters going 3 or 4 innings being more common and openers being used more and more, analytics in all of baseball and strategic decisions regarding when to pull the starting pitcher dwarfs the dh role in the game.
And kid, the last defender of Grady's gaffe, arguably the dumbest managerial fuck-up ever, lecturing about not understanding strategy is pretty fucking funny.