Concur. It's a question of game balance, and there were discussions of a forerunner to the DH at least as far back as the 1930s so the recognition of this problem is hardly a new thing. (The 1930s are closer to the beginning of professional baseball than they are to the present day.)
The impact of a pitcher's arm on a game is far greater than any contribution he can make with the bat, and people recognized the fact once overhand delivery became legal, and certainly once the Dead Ball era was over.
It wouldn't have mattered last year if Matt Shoemaker had been uniquely capable among pitchers of hitting like Nelson Cruz, and all other pitchers hit like Walker Buehler, and there were no DH - using him on the mound meant a likely loss in each game he appeared. That's a structural imbalance which the NL chooses to live with.
Baseball is exceedingly conservative. Movie footage of old football or basketball games look hardly at all like their modern incarnations. Baseball still has pitchers hitting.