Unfortunately, the medical industry (and their lack of focus on nutrition) has done a rather poor job illustrating why milk is bad for you. The studies do support that, but due to poor communication, you get people hand waving away the results suggesting it will be shown to be good for you next week, i.e. this thread.
I can't help but draw parallels to the 60's, when the causal link between smoking and lung cancer was absolutely apparent. Yet, most doctors smoked, so few actually recommended people cut it out. As a result, millions of people perished or had serious health complications. Yes, it's incredibly unfortunate the medical authorities have failed us - but it's not entirely their fault. Doctors receive no nutrition training during their education - none!