Women have been sold on the idea from a very young age that they need a fairy tale wedding to live happily ever after: from toys to tv, from books to movies: the kneeling groom to be with the shiny ring and the large, grand wedding with a dozen bridesmaids. There are multiple industries selling this vision.

Reducing that to "but many women will still want something expensive "just so that the man will prove that she matters to him by buying her something"" .... this is pure sexism.