That's a nice sentiment but given time, it becomes an unworkable position. Look at the J24. At some point you end up with new or multiple builders, with boats that have been restored after damage etc.You guys have to give it up with the comparisons to Stars and facking 505's. Those are not "production" boats. The j/70's are. Their rules are such that unless specifically allowed, nothing may be changed. Period. No tolerances like 5 0hs, Snipes and Stars who made those tolerances originally for home building and multiple builders.
Certainly, each boat is not identical due to many factors, including human, but I have a hard time believing that every top J70 team "shopped" their boats before purchasing. Perhaps, but I'm betting not. I assume that each J70 mold was made from one plug. They may shop out the foils and keels, I really don't know.
But the bottom line is it is a production boat, with strict rules. Changing the shape or profile of any appendage or hull form is verboten. Period.
Do not cheat and you can play. Cheat and get caught, you may not play.