The world is messy for all sorts of reasons, that may not be the way anyone would like it to be but it's the way it is, and imo it's best to learn it when the stakes are low rather than when they're later voting against other classes because they were never exposed to people from them early on, or they're being taken advantage of at work or in an adult relationship.

I wouldn't fault someone for wanting to situate their kids among peers and adults that help them grow at a similar level rather than hinder it, but I think it's also best to be a guiding hand rather than a applicant tracking system when it comes to the non-academic side