There may be a position somewhere between not marking the opening at all and maintaining an expensive system of inherited power and wealth?
We had a royal visitor, who came to see some students taking part in an exercise making hovercraft. His visit was a bit of a pain, because places got repainted, he had to have a designated toilet set aside (with nice loo roll), there were security checks beforehand, etc.
I suspect the royal visitor was bored shitless, and the students didn’t really benefit from his visit. A visit from someone from Scrapheap Challenge, or the Discovery Channel, or Guy Martin would have been much better for all involved.