I still glow, more than a year on, when remembering the joy of DS1's wedding. It doesn't make a difference to how married life is going to be, necessarily, but a good wedding is a lovely experience with fond memories for everyone involved. DIL's parents took the strain but not the attention, except perhaps the credit for raising such a fabulous daughter, which was fair enough imo. Everyone behaved, even me when I had to stand next to XH and look cheerful. (I should have had a medal for that.)
They didn't do a wedding list as they were ok for household effects. The note in the invitation said all they required was our company on the day, but if we felt we really had to give something then a financial contribution to the honeymoon would be welcome. I do not think this is at all disgusting, in fact the way they did it was quite gracious and sweet. Why shouldn't someone be happy to give a portion of a romantic memory, tailored to what they can afford/think is right, instead of yet another silver cake-knife? On the other hand they still don't have a decent telly or computer, but they didn't dream of asking people for something so expensive. (When I got married, several hundred years ago, I hadn't even thought about presents when the invites went out, and was caught completely on the back foot when people started to ask about a list!)
Also don't get the grumbling about wearing white. OK, so say it used to signify virginity (not absolutely sure this is true actually?) whereas nowadays some brides aren't virgins. Is that any reason for it not to remain a sort of bridal uniform, so you can see at a glance which one you are supposed to congratulate if your eyesight isn't all that? DIL looked fabulous in ivory satin, which is enough to make me stand up for the fashion against all comers. It's none of my business what she and DS got up to and when, and frankly irrelevant to the proceedings. We were there to help celebrate their relationship, not to give them "permission" to shag.
Waste of money? Sure. So's a holiday, but lots of people still have 'em and even claim they are "necessary". It's not necessary, but if you (or in this case the bride's parents!) can afford it, why the hell not?