It isn’t about making snob value judgements but all about making offers and future marketing.
Answers to those questions show the profile of families who apply and those who receive offers and those who accept offers. It tells the school about typical occupation, where people live, other schools their kids go to at various ages. All of this helps the school with future marketing - magazines read by people with certain occupational profiles, websites, banners etc. It helps them decide which primary schools it’s worth having an outreach programme with and which it’s not worth it with, and which Preps to target and attend their senior school events. It helps them decide where their current parents are and where to try to expand the net to and to indeserstand what some of the barriers might be for some potential customers. Because these families are potential customers and the bigger the pool of applicants you can draw, the higher the standard of the children you can offer to and take.
Honestly schools aren’t deciding who to offer to based on if they are the ‘right type’ - this is quite different to acknowledging from the data that every school does have some broad types of family who apply, and wanting to understand that for marketing.
As has already been said, the info also guides schools when making offers and even deciding who to offer scholarships to. They face the tricky task of over offering to the right level, so that when some reject the offer and choose another school, they still fill, but don’t exceed capacity.
Knowing where someone lives isn’t to tell you just they have a big house (or not) but if they are close enough to be likely to accept an offer, or if there’s a very similar or better school much nearer.....and in all likelihood they will accept an offer from there. So they might give ‘likelihood of accepting an offer’ scores to applicants when making offers to try to get the numbers right. Equally, lots of older siblings at another independent is a good indication the child will go there rather than to the school in question. If they haven’t applied anywhere else they are more likely to accept an offer.
So don’t feel personally judged by those questions. People aren’t thinking you’re ‘good enough’ or not, but looking for patterns of who applied and trying to work out how serious you are about committing to 7 years of big fees!