Towers is a tourist destination that is very important to the UK tourist industry. It is constantly being deprived permission to build new things that would attract more tourism, partly due to the need of protecting a beautiful estate and gothic ruins. In ruins mainly due to its own country's army abusing it. It also doesn't require a billionaire to live there at tax payers expense to be a tourist attraction.
The day the government end up spending millions building world class Giga coasters all over the Alton Towers estate and taxpayers foot the bill for John Wardley to live inside the mansion with a crown on his head, whilst the Royal mint starting pumping out £20 notes with his picture on it - I'll concede that a monarchy is a good idea because of its tourist credentials. But that won't happen because it would be insane, and so are the excuses for having a monarchy.
Like I said, if its sole purpose is keeping flag wavers who fall for "look over there" government tactics happy, then fine. I wouldn't begrudge people of happiness. But please spare me the excuses. Not a single one of us here knows any of the royal family personally, what they do or who they really are. Who else in your life do you bow down to and pay tax money to keep in riches just because the government and media tells you to? I suspect the answer is no one.