The Royal Family turns apparently normal people into simpering idiots.
As Aileen said, it's the cult of celebrity. People are turned into simpering idiots by Zane from 1D, Jeremy Corbyn and Katie Price. That in and of itself is not a reason to do anything.
The Monarchy has no actual power (if HRH tried to actually exercise any notional powers she currently possesses, she'd find herself quickly dispossessed of them), so we should simply judge them on the economics of the matter.