Good call.... Although I respect the hell out of Dr Dave. Suggesting that playing with inside is somehow not a good approach, regardless of the player, seems odd. I'd go the other way and say do it more often if it feels uncomfortable to do. I didn't follow the link so maybe I'm pulling him way out of context.
Off topic but relative. When I was being taught how to weld. The millwright told me that whenever possible perform the weld with my off hand. Without the aid of hindsight this confused me, so I ask the obvious question. His reply was simply...: "When you find yourself in a position that requires your left hand. You won't have any problem doing it." Words to live by imo...