And if BBWAA voters, as a bloc, applied the consistent principles you listed Diderot I think we'd be better off.
My observation, starting with Raines but extending to about 40% of the players in the Hall, is that the writers play shufflecups with (1) the "morals clause" and (2) their own feelings about who they like and dislike. Commit crimes but gladhand with the press, they're just as liable to look the other way. Be *obnoxious* off the field, and OFFEND the press, and they will not look the other way.
Your point (2) "Immoral but not related to baseball" is telling. Nobody who has a domestic abuse cloud hanging over them is going into the Hall of Fame. Ben Roethlisberger's crimes might be forgiveable; the accusations against Aroldis Chapman are not.