Part of what makes this discussion so annoying is people invariably read "HBBS is sub-optimal" as "HBBS is bad". No one thinks that high-bar squatting is bad. Rip doesn't, Jordan doesn't. I'm sure that in general the SS coaches are excited to see people squatting big weights and making progress regardless of style. That doesn't mean they don't think that virtually any high-bar squatter could improve their general strength by x% by switching to low-bar technique.
People keep saying that we do, but we do NOT have experimental data showing that HBBS is optimal. We have experimental data showing that it is GOOD - high bar squats get people strong and drive up the main lifts.
We do not have any data on whether LBBS is good OR bad (not really, anyways) for weightlifters, and we certainly don't have any data showing whether HBBS or LBBS is superior for weightlifters. In the absence of this direct comparative data, we are left with arguments and ONLY arguments. Part of the HBBS argument is "that's what all the great lifters use", which means it is GOOD but not that it is optimal. Think about the 3-pointer in basketball - until Larry Bird prioritized it, it wasn't really considered a scorer's weapon. Now virtually all of the best perimeter scorers in the NBA shoot it at a high percentage. Even non-specialists like Kevin Durant and Chris Paul shoot it at rates that were unheard of even from the best back in the 80s. The 3-point shot was simply assumed to be not useful for the specific things that scorers needed to do (collapse defenses, score under pressure, etc).
I think there's a similar dynamic here with squat style. There may be benefits to a hip-dominant squat that simply have not been acknowledged and realized yet, even at the high levels of the sport.