@MyOhMySimon
So agree with your post. In the excellent Norman Baker book I've linked before, there were all these bizarre practices he outlined.
For a visit, everyone had to be there hours before the royal turned up, no one could be sat in their company (obviously being in a wheelchair is different) and on one particular visit, some there wanted to go up to a balcony type area to see better but no one was allowed as that would be looking down on the Queen and it's just not done.
The aides are there hours before telling you what you can and can't do. Don't speak unless spoken to, don't offer your hand unless the royal does first etc.
It would take a brave person not to curtsey or bob down in a line of people
But that would make it non optional because it would be stopping people who want to do it
Who on earth would want to do it? Rees-Mogg maybe to get back in Q's good books after the prorogation of parliament and his part in it. And he was born over a century ago anyway 