The point of the ‘straight’ cue is to stay loonngg through the zone.To hit in a ‘big zone’. The curved path would be a late adjustment to a pitch and is less optimal. If you believe the barrel follows the hands. Then this isn’t something that would be questioned.View attachment 14214
The gif on the right (which is still circular, albeit a bigger circle) is a demo swing of someone lunging onto their front foot. I've never seen anyone teach lunging.
Can you show me an overhead video of an MLB player using a straight hand path on a normal swing? I know most people imagine that it happens, but it's like Big Foot. Of course people reach for balls all the time, but I don't think I've seen anyone teach that method of swinging. One doesn't need to learn to reach, you need to learn how to swing properly.
The best try to keep a straight line to any pitch which serves the purpose of efficiency in both time and space. Take the young lady analyzed the other day with the leaky back arm. Her path was a bit long and around. Less efficient in time and space. Make sense?
Late adjustment, less optimal: