The older I get the more I realize this to be true. Of course the 'horses for courses' rule applies but in general an all-around race boat is fairly treated by PHRF and I've done it enough to have a qualified opinion here I hope, after many boats and lots of years.
I find your posts to be informed and insightful; reminds me of the old days of SA before all the keyboard wankers showed up. 3 seconds, 9 seconds... the rating seldom adds up to "the difference" between who got to the first shift and had better boat handling.
The complaints come from the back of the fleet guys with a dirty bottom, shitty sails and a red flag on their backstay who are looking for reasons to feed their ego after not having spent enough time racing boats they can learn to sail properly. I frequently race Lasers in the interest of eliminating these variables.