Well put. I think the idea is that even aggressive hitters that chase out of the zone can still be selective. It's not necessarily that they swing at pitches out of the zone, it's what pitches they swing at out of the zone. I agree in general that hitters need to be more selective, forcing pitchers to stay in the zone, but if that takes the aggressiveness away from a hitter and they suck because of it I don't see how that's a win. It should be more about getting a hitter to understand their own tendencies and work with them to become a better hitter rather than completely revamping a guys approach in order to (hopefully) make them more successful. When you have guys like Rosario that swing at everything, that's still about pitch selection. Its the same basic message. They just have to realize which pitches they can do damage with, not what they can make contact with. There's a massive difference between those two concepts. Similarly, just because it's a strike, that doesn't mean it's worth swinging at in certain situations.