I'm of a similar mindset, but I've seen the discussion on tuft color come up on a consistent basis, on threads, people emailing me, at the show I had a couple ask me and its hard when they have a standard in hand and it doesn't clarify. It seems to leave a place of ambiguity that I'm not sure was intended.I do agree that maybe it should be clarified in the SOP.
But my thoughts are that since the outlines for an SOP is to have a true representation of a variety and breed. In the APA they state its to promote good type and health. Maybe they felt that tufts don't represent a huge issue to focus or it may have gotten overlooked. The only thing I remember about tufts was at a genetic a breeding stand point. My understanding was having black tufts wasn't a big deal unless you wanted to have a better color balance for the offspring. Then you would for sure want the copper tufts. Who knows.