I think it's disrespectful to wear all white or cream to a wedding. It's nothing to do with competition or guests not knowing who the bride is (wtf?), it's about etiquette and manners
Ok so let's probe a bit further.
Why do (some) people think it's disrespectful to wear white? Just saying "but etiquette" doesn't work.
Given that most comments on the topic on here do end up being about upstaging the bride, it isn't your day, your pale colour dress might look white in certain light, you're trying to outdo the bride, etc a lot does seem to be grounded in good old fashioned sexist ideas about women.
PassTheNuggetsPlease
Wearing a colour of mourning in one culture isn't the same as not wearing white in the UK.
For a start people typically didn't wear black to UK weddings but that seems to be changing too, just like the tradition of only wearing black to funerals is changing. In many circles wedding attire isn't as fixed as it was.
fwiw I don't suit black or white, but do object to snark towards other women for wearing a white and floral cocktail dress because it's not your day 🙄.