No, I don't agree re the self-centredness, it's just the changing times and pressure from your peer group. It's not as if many brides now marry from their childhood home anymore, and also many of them do pay for their own weddings, so therefore feel quite reasonably that they can have an event with friends rather than family, if that's what they would prefer. I know how close you are to your family jings, but not every family is that close.
My niece said she had no idea what would be expected of her until she started trying to organise her wedding, friends started saying 'but of course you have to have an expensive gift for everyone, toys to amuse any children, entertainers, photo booth, guest's book, etc. etc. etc.' It's enough to make anyone want to elope.
Which is really what is happening. The thought of all the fuss and bother makes people elope, not that they don't love their family.