No one is interested in knowing how to better describe which team is intuitively "better shooting" just for the sake of knowing it. People use FG% as something like an overall performance indicator. As such, we already know that using it has limitations. But that doesn't mean it's uninformative and should be rejected. He also hasn't shown that it is typically less informative than a 2pt%/3pt% breakdown. He'd have to do a lot more work to show that.