I'm not sure how helpful it is to talk in general terms about the approach each school takes to Rugby and its place in school life generally. When I was at school (back in the dim mists of time), the expectation was that the ideal was to produce a well-rounded student, who was proficient in the classroom and at more than one sport, and who had other skills as well (artistic, or musical, or whatever). Of course, only a very few lived up to that ideal, but the aim was balance. Rugby was one thing that you did as part of that package. But times have changed. I spoke to one Associated Schools headmaster not long ago, and he said that now that boys could win six-figure contracts to play Rugby within a year or two of leaving school, the school needed to see that as a legitimate career path, and provide the boys who had a chance of doing that with an opportunity to achieve that aim - in the same way that the school helps other boys aim to get into Law or Medicine.
So, I suspect, in each school, you have a mix of boys. Some are preparing to try to make a career in professional sport, others love the game and will go on to enjoy it in Grade or Colts, and others are having a good time and probably playing the game for the last time. The game needs them all, because the ones in the third category will end up paying to watch the ones in the first.
That applies to St Aloysius, too, by the way. It may be academically selective, up to a point, but it has also produced a fair number of Super Rugby players in recent times - think Foley, McCabe, Kingston - as well as one or two who have gone into League. What handicaps St Aloysius, I suspect, is that it is the smallest of the Associated Schools, so depth is an issue, and it doesn't actively seek to attract Rugby players, as some other schools do.