I get it OP. Currently doing the rounds of uni open days and one or two friends/family have been interested in which unis we're visiting and then scoffed when I said we were trying to choose ones within a 2 or 3 hour drive and questioned why, then scoffed when I said we might visit said child for the odd weekend, or that said child might want to come home for the odd weekend.
They also scoffed at me for going with DC for open days.
As yet, their children aren't at this stage, so let's see how they approach it.
Britain has a culture of considering it to be macho if you send your university age child as far away as possible and refuse to socialise with them. It's considered 'weak' if you do anything else. Ridiculous.
OP, university terms are short. Their summers are long. Your child has not left home, they are just away during term-time, much like boarding school kids, and no-one considers them to have left home, so they? Try to reframe it like that.