Ah, just checked the username. We meet again.
OP, as you can see, this poster doesn't believe that the rule on white is a real thing, and thinks the likes of you and me and others literally made it up to spoil weddings and are lying about how long ago and how many times we have heard it, seen it used as a plot point in films and TV and so on. (They also accuse everyone else of being too invested in it, which is kind of funny once you're familiar with how long, hard and passionately they'll argue about how terrible it is to suggest you just wear the pink.)
Obviously, we know this isn't true because you've heard it, I've heard it, your daughter heard it, other posters heard it, and we know there is no malevolent conspiracy, just a pretty standard and long running etiquette that exists in other cultures too (Indian wedding guests don't wear red for the same reason and they don't seem to have any trouble with the concept).
You've asked for views. In my view, that dress is too light, too white or close to white, but the pink is lovely, actually prettier. Do with that information what you wish. Tell the wedding etiquette cabal I said hi.