How far you hit it isn’t the issue.
I use 50 yards because I want a short swing. You’d be amazed how many 120 yard blasts I get because people just have no idea what a P3 backswing is.
Left arm parallel to the ground. Everyone takes a full swing.
The point is to learn how to have body control, stop the backsiwng short and hit it solid in rhythm.
My “Wedges” video talks about this in detail, but I see few golfers capable of doing this first try.
It takes time and effort on every swing…and guess what? You get a better golf swing and better from 50 yards.