You've really touched on something here.
The 'shift' the giant leap to a new phase of life, is often missing from modern, maybe dare I say - western - marriage ceremonies.
They haven't largely changed, but people's approaches to sex, children and marriage has.
Perhaps it now feels like there's a gap between the way weddings are conducted and what they increasingly symbolise now. Which perhaps is nothing more than a formal legalisation of a lifestyle already commenced.
It's no longer the 'Bride being given away' she already has been 'given' so to speak. Also even that way of thinking is no longer in vogue, where partners are often considered equals who often even pay equally for their own marriage ceremonies.
The Bride isn't half nervous/anticipatory about the wedding night. Neither are desperate to be together at last as proper marrieds and for the day to be over/fearful it's over. A lot of the emotional charge is now missing.
When I was growing up in the early 80's it was still considered a bit🤨🤨 if a woman had the 'audacity' to walk down the aisle pregnant. Equally it was much worse if she didn't walk down the aisle at all!
Likewise the marriage being 'big' and inviting your mother's-3rd cousin-daughter's-boss'-sister and her husband was partly so everyone within a hundred miles would know that Jenny, Lisa or Sarah was now an 'honest' woman and any children conceived beforehand/to come are no longer/will not be illegitimate or worse, 'bastards'.
All this is increasingly redundant now. It isn't a big humongous shift. People don't enter into married life green anymore. People don't need pots, pans, bedding, and cutlery because they are starting from scratch.
It now just sounds grabby when people have lists of required items now as they (perhaps) stem from wants, not needs. The couples wedding night isn't a mystery to them. You could argue it held more excitement the first time they were intimate in the exciting period of dating and getting to know each other.
Marriages haven't kept up with societal shifts in women's rights, status, capitalism and religious and or moral attitudes.
And then there's fast moving Social Media now to boot.