Like most people in real life, I wouldn’t have particularly cared if everyone had turned up to my wedding in white lace, especially as I didn’t wear a wedding dress, but it seems like it’s enough of a “thing” now that it’s better to just avoid the aggro. I think the fact that you are even asking means that you know already that it’s “inappropriate” (in someone’s eyes) for the occasion.
Having said that, I really don’t understand the endless agonising over what to wear to weddings. Literally no-one is (or should be) looking at the guests, and spending weeks and £££ looking for the perfect pair of chartreuse kitten heels seems bonkers to me, as is buying a whole new outfit for every wedding you go to in case someone else there has seen it before, especially when you go to 37 weddings every summer.