If we get back to the point I was trying to make which was comparing 15rm and 1rm. Any powerlifter will tell you they are chalk and cheese and different expressions of strength.
In my case you may well be right and thank you for your interest. I actually increased part of my weights program which was using Joe Kenn’s Tier setup a few months ago to where in part I was doing up to 12 reps. I believe that has led to some strength gains and I will probably use a similar or higher procedure next winter (summer here now). That said the weight room is additional and supplementary to other work.