It's 2019 and people still like to mock cultures and traditions blindly. The article does a pretty good job of explaining a lot of the situation in a grounded, rational way -- especially concerns over the uses and potential abuses of taxpayer money.

The US essentially deifies the Founding Fathers even though we're living in a world with influences and technologies they could never have anticipated. Why is it ok care so much about that history but not for other countries to care about their history?

The system of government also doesn't seem like a firm basis of argument to me. Yes, many governments have moved on from monarchies, but that doesn't mean that there may not be a monarchy in a country in the future, nor does it mean that a monarchy is an objectively terrible country to live in.