A private schmaltzy poem in the back garden is not any kind of wedding - it isn't any kind of contract and is therefore patently not a wedding. Wedding means contract in law or religion.
People that have two ceremonies, one in their chosen religion and then a legal wedding, are not in the same situation as H&M at all. No "poem in the back garden" type of wedding exists - it's isn't a religious, humanist or any type of ceremony .
H&M openly mocked the UK by saying "this spectacle" was a fraud as we were already married and it didn't mean much to them. Until the AoCanterbury said the Saturday was the legal wedding etc.
That's quite insulting actually and most people would have been very, very happy for them to have not had a big wedding. It was on a Saturday, ie no one had the day off or anything - when W&K and Charles and Diana were married there was a bonus one-off national holiday ie. extra bank holiday as heirs to the throne etc and wanted people to have parties etc.
Everyone would have been happy for a small private wedding for H&M. They had a big affair because petulant H wanted exact same fuss as William. Obviously there wasn't same fuss, no extra bank holiday and wasn't held during the week - most people were out and about doing stuff as not a bank holiday and normal weekend. I didn't watch it myself as thought it was a daft fuss when William already had heirs.
So the people that went along with it to support H&M and make them feel important
with a bit of flag waving and then H&M tell everyone on TV that it was rather tiresome for them after all
charming..!