IMO the Queen and Prince Charles wished for a big wedding. Harry was not a minor royal and was a fulltime working one. As Harry was the son of the Prince of Wales I think a big wedding was expected by the media and the grey suits at the Palace also thought it was a good idea. His wedding was largely paid for privately by the royals, except for security. And TV coverage was expected.
https://www.businessinsider.com.au/...arkle-royal-wedding-who-pays-2018-5?r=US&IR=T
Peter Phillips, Zara and Beatrice and Eugenie weren’t working royals at any time of their lives though Eugenie got a large wedding at St George’s with carriage ride, and security paid for by the taxpayer.
It was expected, but they've done a lot of things that were *not* expected. If they'd truly wanted a smaller wedding I'm sure they could have had one. Nothing apart from Meghan's comment suggested they wanted something smaller before or after the interview. She seemed to just want the "gotcha" moment of revealing that they (did not) get married three days before. And it fit in with their complaining about everything about royal life.
They also invited a lot of Hollywood celebrities that they didn't know so I don't think they were upset about "the spectacle" and glamour of it at the time. And then there's things like the extremely expensive engagement photo dress that no one forced them to choose which wouldn't necessarily have been available if they'd had a smaller wedding.
St George's is basically the family chapel and a royal peculiar, so it's not surprising that many get married there, whether they're working royals or not.
So how are these wedding expenses judged? Peter Phillips and Autumn got a big wedding but they are divorced now. So despite the expense, not all marriages pan out and no refunds are given to taxpayers. Even if Harry or any other younger royal wanted to elope or have a very small wedding with only a few people, they probably would not be allowed this type of wedding by HM.
It's not the expense it's the fact that they complained about it whilst not acknowledging any positives about the situation. They seem at the same time angry about the hierarchical nature of the BRF but desperate for the perks (titles, money etc) they clearly both like publicity (see the last 18 months) yet complain about a "spectacle for the world" whilst claiming to have actually gotten married three days earlier, which was factually incorrect anyway. This was also the big event that showcased Meghan to the world and she may not have had a big a platform if there were no TV cameras around.
Harry complains about being cut off but doesn't mention his father gave him at least a lump sum into the Summer of 2020 and maybe more. They seem to think "financial independence" meant just the Sovereign Grant but the Duchy money would keep flowing.
Harry complains about being the "yes man" but doesn't acknowledge the fact that actually his elderly relatives clocked more engagements than him and that he had the time and money to get help for his problems that others don't have.
They complain about the institution being toxic but want to come back for the good parts.
They complain they were silenced but don't acknowledge the enormous platform that the monarchy still gives them to this day.
Allegedly they think Dumbarton is silly but are fixated on the fact that their children might never be HRH.
They complain about the things they got and complain about the things they failed to get, it's part of a pattern that is frustrating.