Not sure how much practical sense Dusty is making here. I don't think you'll find many major league starting pitchers who can't help but pitch to hitters' strengths. With any kind of scouting and preparation, they will work to hitters' weaknesses -- or at least avoid hitters' hot zones.
Of course, pitchers do vary in how they work hitters and in where they tend to get outs in and out of the strike zone, based on their repertoire. It could be that the distinction Dusty is making does boil down to playing Heisey against harder throwers -- they'll be the ones who are up in the zone -- and Ludwick against softer throwers.
I do agree with those who are saying that Stubbs needs to be in this mix to a certain extent, too.
"Baseball is a very, very complex business. It's more of a people business than most businesses." - Bob Castellini