I'm not suggesting that the school is bad. The main school I attend focuses a lot on hands, and neglects kicks and grappling. I'm okay with that, even though it has those weaknesses. In fact, I don't think it's even bad to completely neglect certain things, as long as you have a way to handle people trying to use them in a fight.Or that students who gravitate towards kicking and are less able with their hands join a kicking oriented school. It's a bit like natural selection, actually. It's the quality of the training that matters more than time spent, as long as it's not completley neglected.
But, as far as I'm concerned the idea that if a school as a whole practices something more than others, that's what people will improve in, is not really something to be debated. That's how practice and growth work; what you practice will improve.