totally <3. i also realized i kind of sketched this out but didn't fully explain. i don't think the heart of it is the opulence or extravagance; more that it's about the specialness of the day and the focus.
mormons think they're normal perfectly average christians until endowment because people who aren't endowed aren't allowed in the temple even if they're a mormon child in a mormon family. (to the point that exmormon youtubers and social media personalities regularly get comments from mormon youths saying that they're lying about the temple and endowment and all of it). + endowment takes place after high school graduation and the expectation is to marry YOUNG. so these girls are generally 18-22 (up to 24 if she both went to college and on mission), brand new to a church that runs on social pressure and expectation, and trained for their whole lives to obey and trust authority without question while ignoring their own feelings and misgivings. the consumerist american values and ideas of the wedding are in full play, including ideas that are WAY more powerful for mormon girls. it being the bride's day is supercharged in importance when the bride knows she will never get another day.
i think in the mormon girls' consciousness, she always knows she's going to be second fiddle. or fourth or fifth. she'll never hold the priesthood or be a leader to her family or community and even in the afterlife, she's beholden on her husband to call her forth by a secret name into paradise. and he can choose not to. but this day is supposed to be the day where she gets to be her own person and honored for her necessity to the whole process even if she's in a support role. where she gets to be recognized and honored for the role she's committed to.
and then. she likely can't wear her wedding dress and will be forced to buy another one in the mormon church giftshop that also sells the secret underwear. even if she does get to wear her dress, she has to put the shit quality mass manufactured one-size-fits-all temple garments on over it to feel ugly and undifferentiable during the ceremony. and her wedding ceremony is conducted in a factory style and it's exactly the same as the other girls that have gone ahead of her. to the point the bishops regularly get their names wrong. and then they don't get to exchange vows. and then they literally aren't allowed to have any kind of wedding celebration disconnected from the church so they can't hold a reception without a bishop in attendance to spend the whole time denigrating the importance of her relationship with her husband and telling all the non-mormons that the most special part of the day is over and they weren't allowed in because they're not holy enough and this reception is just a stupid meaningless party. telling everyone that the only part of the day that the bride had any say over and the only part where she's meant to be special means nothing and is nothing. the part that matters is the part where she doesn't.
during what is supposed to be her special day, she probably never feels more reduced to being an interchangeable hole whose purpose is producing flesh children and spirit babies. any other girl could have been standing there with your husband and it wouldn't have made a single difference. and this is the day your whole life has been leading to.
like, it's the young ages and the recent surprise of what the church actually is and the unbelievable sexism to their liturgy and how it's all mutually exclusive to an american wedding culture that mormon girls are primed to invest in. like these girls talk about picking out baby names and starting wedding scrapbooks at like 8. they're all trained by their religion to be the girl in class that is the most obsessed with getting married and having babies and then, right before what they've been dreaming of for their entire life finally happens, all of those dreams are crushed into dust and replaced with something i think every american would call a very bad wedding.
like. when you think about how a non-mormon girl who started her wedding scrapbooks at age 8 would react to the priest at her wedding getting her name wrong, to not being able to wear her dress, to not being able to choose her venue or have her different religion family members and loved ones in attendance, to have the same guy who got your name wrong in the ceremony follow you to the reception and continue to shit on your relationship in order to remind everyone that the Church is Most Important? she'd murder that priest and burn the fucking building down with everyone in it, laughing while people fled. and then she'd have a re-do and no one would be surprised. the mormon girls seem to leave the church about it, which is basically burning their whole lives down with how enmeshed the mormon church demands you be.
they train these girls to look forward to their wedding as the most important day of their lives and then their church structure actively manufactures the worst, most depersonalized and disrespectful weddings i could ever imagine. and then girls who've been dreaming about their weddings forever go "actually fuck this and fuck you."