I get what you're saying, and I agree with much of it, but I think it gets some things in the wrong direction. Take for instance beer league softball or high school baseball -- why aren't they shifting there? Why are infield hits and (in HS baseball) stolen bases a bigger deal? I think it's two things: 1) lower velocities / fewer breaking balls and 2) worse defenders.
In slow pitch softball, shifting is useless because guys can easily take the ball the other way. Same was true in the 1980s when starters were averaging 88 mph on their heaters. And in high school, the pitchers aren't throwi