Not speaking for the other 7 here but you are right Gerald I cannot offer a scientific basis for my opinion.
What I can offer is over 30,000 roll processed in pyro , contacted then prints made from over the last 15 years. Not to mention the Sheets of film.
Some people make charts and plot curves, drink wine and pontify about printing
Others make a living from it and work 7 days a week at photography.
Which group do you fall into??