>Can you not see any advantages and positive achievements of the British history of constitutional monarchy, common law, Bill of Rights, etc? Jury trials, habeas corpus, etc, have done much for freedom. The legacy code, if we might call it that, is the only thing still holding back the authoritarian ambitions of the powerful.
So what's your position exactly? On one side you claim it's a powerless family that would get replaced by a (potentially) worse elected person, on the other side it turns out it's a very influential family that prevents authoritarians from taking the power. Then, you finish up with non specific examples of republics that are much worse off than UK monarchy while conveniently excluding republics that are doing equally well or better than UK (you didn't specify in what UK is better so I can also be nebulous I guess).
In my view, monarchy is an artifact of the past. It's pretty much a family inheriting rather high privileges because of some things (which we can agree were important) that happened in the remote past. Nowadays, what's the point? Why do we need to continue with that? If they're powerless as you say, why not just get rid of them? Save money, make the country more democratic (at least on paper) and all that. Oh yeah, and as a spaniard I can also guarantee that a monarch can become a piece of trash like any elected official so those guarantees are thin as paper.
I just would like to hear real arguments about why a monarchy is so much better than an alternative.