It isn't really a new analytical data. Swinging 3-0 is not something new and players have been doing a lot in nearly every era of baseball. It is just now we can quantify that it is actually rather beneficial to swing at those pitches when they are presented by the pitcher. The idea is not to just hack at pitches it is to swing at pitches that can provide a positive outcome which for some is like this foreign or taboo idea because you don't swing on a 3-0 count because?
You haven't even provided anything to go against the claim that swinging at a pitch going right down the middle of the plate is a bad idea regardless of the count. Some of the greatest hitters of all time just maximized their opportunities when they did decide to swing. If you are getting a pitch going down the middle of the plate and you are not swinging at it you are not maximizing your opportunities. You are actually in fact decreasing your opportunities. Players who are hitting in the low .250's should be trying to maximize their ability and that is not going to happen when you are watching a pitch split the middle of the plate. The idea here is to maximize those opportunities and to have the player swing at pitches where it maximizes their opportunity to be successful. You can't be looking at a count and go oh it is 3-0 don't swing because why exactly? These players don't have the skill of a Tony Gwynn, Paul Molitor, Robyn Yount, Ted Williams or name a good hitter here. They just don't have the skill to be those players so they should be swinging at pitches which puts them at an advantage. Pitches that are over the heart of the plate are the pitches they should be swinging at.
Players who have swung at pitches in the heart of the zone on a 3-0 pitch are hitting .491/.464/1.226 this season. Why do you believe looking at that pitch is a positive? Please provide some evidence or logic behind watching that pitch go down the heart of the plate on a 3-0 count. These are normally rare misses by a pitcher and you should be attacking these pitches not watching. What is the actual logic or reasoning to watch a pitch go down the heart of the plate?
I doubt you will ever answer these questions as your responses have been more condescending or just one word responses. Which tells me you are just stuck in your ways of old school baseball you don't do these things you would probably make a great Cardinals fan.