It was iconic at the time. If Diana wore it, she must have adored it. The time of the wedding needs to be considered, not compared to fashions of this era.
Her wedding dress, as well as many of her other dresses & gowns, were on display at Foxwoods in CT. I'll never forget seeing her wedding dress. Breathtaking.
Any thing too much prestigious / too much acknowledged / too much Royal / extremely beautiful has always a chance of getting affected by EVIL EYE. And some individuals are prone to this.
Diana's wedding dress was far from a beautiful creation. It was way too big for her. It's one of the strangest fashion statements, and I would love to know who designed it. I'm sorry. You cannot compare it to the gorgeous gowns of Kate and Meghan.