The monarchy is dying on its feet. The traditional reason to have a monarch (in modern times) was that they 'united the nation.' That is no longer true*, and in fact, I would say they actively divide it.
* It probably was in the 1950s. Maybe as late as the 80s.
Sure there will be crowds watching. There are crowds wherever Flying Scotsman is put on a train. So what? Most people are at best, indifferent. I honestly could not give a shit, I just think the so-called royals are a complete waste of resources. They're just a random family, picked by chance to be treated as demigods. It might have made sense in 1323, but it definitely doesn't in 2023.
BTW one of the polls that I saw today said that 70% of blokes are not interested. 70%!