Bart: I know all that, but also have had many years experience accurizing rifles and found what I wrote to be true. Pressure points can reduce amplitude of barrel vibrations, causing different bullet weights and loads to shoot closer to the same POI. As I mentioned, all of my rifles are free-floated, except for my 10-22, which needs a pressure point to keep the rear of the receiver in firm contact with the bedding.
Incidentally, that rifle shot 10 consecutive 5-shot groups on one sheet of paper, averaging .37". There aren't many of those that will do that.
People are like rifles. Some are tried and true, having great eyes, personality, and fun to be with. Others never seem to hit the mark with you. Still others go off half-cocked. Still, it's nice to know most of them.