The thing I don't get about all these wedding threads is that whilst it isn't all about the bride (though the only bridezillas I've ever come across are on reality TV) it is, IMO all about the B&G - you are being invited to share their day.
Guests are invited, usually at the couple's expense if not their parents expense, they're not (usually) asked to pay for the wedding, so why should anyone other than the B&G get ANY SAY WHATSOEVER in what happens on the day/what they choose to spend money on/who gets invited?
Sure be accomdating, if you hold your wedding at 3am in the arctic circle on Christmas day and say no kids, you accept that most people are going to say no and not come, but it's your (the B&G's) day so have it where you want, when you want with who you want.
Sure, it's a bit tight to spend 10 grand on a dress and not have a free bar (I've only been to two weddings with a free bar, all the others have had a welcome drink/drinks with the meal and then pay for your own), BUT if it's your money then surely you get to spend it on what you want???
Being a bridezilla and ignoring your husband or wife to be is totally unreasonable, spending your own money on what you as a couple want to make your day memorable and special to you as a couple, is not.
As guest you will go to x number of weddings, as the B&G you spend a lot of time and effort planning (what you assume) will be your only wedding and I think sometimes this is forgotten. To quote the OP, it is about both the bride and groom coming together, not the guests coming together at the b&g's expense