A good, albeit controversial, argument in favour of monarchy I’ve heard recently is that a monarch has to plan ahead for decades, if not centuries, to ensure them and their dynasty can keep ruling over a prosperous country.

A democratic politician only has to care about the next 4 years, at best; if any issue requires long-term planning, all you can do is hope it fixes itself.

China is a country. Lots of people live there. Some of them have long term planning for some aspects. Some of them don't.

I agree about China. Probably Russia too and other countries with... longer term leadership.

Remind me of some of the things that Biden himself planned during his presidency.