[EdZ]

Ally - with any plane line really. The push is relative to the plane, not the ball-target line.

So open/square/closed to the target line, a hitter is pushing more 'out' and swinger is pulling more 'along' relative to the straight plane line.

Now keep in mind that it is only pushing vs. pulling that separate hit vs. swing in the final analysis, so it is possible, although not advisable to mix components around, but it would be fighting the laws of physics!

Think of kicking a football/soccer ball.

The swinger, with an on-line delivery, is kicking more directly 'down the line' - more of a front/top of the foot kick. (but importantly, still from the inside)

The hitter, with an angle of approach, is kicking more from 'inside out' - more of a side of the foot kick.

Because we stand to the side of the ball, both swingers and hitters are always moving down, out, and forward. The hitter's lack of rotation of PP#3 means they have a touch more 'out' in order to support impact with the right forearm, just like the side on football kicker.