Here ya go. This shows it all. To me it's a no-brainer.
Make up your own minds as to - what to do when confronted with death.
Below: evan demonstrating the 'move off the X':
Below: Lurper demonstrating the 'stand and deliver':
Evan's move off the X - while shooting - shows a shooter bladed to the threat.....effectively reducing his overall size by about half 'and' covering part of the shooter's left side with the arm. Makes sense to me.
Obviously, a smaller moving target is harder to mortally hit than a stationary, stand and deliver target. Especially for an untrained shooter.
In comparison, stand and deliver provides a non-moving, double wide target.
But then, I've known this stuff for over forty years. :)