I'm thinking about three players in particular.
Banks, Carew and Killebrew.
Banks and Carew were moved to 1B in the middle of their careers. I can't recall anyone ever saying "Dudes played with iron gloves" about either one.
Killebrew bounced back and forth between OF, 1B and 3B his entire career.
Do you not think, in today's game, that they play SS, 2B and 3B, respectively, while a Prince Fielder type plays 1B?