I think I've learned something from this thread.
Many people who support the monarchy just like having a Queen who was born to the position and is committed to doing it until the very end. The position might entail smiling and waving, or signing documents for the government, or actually just existing. I expect the same will be true for a king, in the future.
So we can have that, can't we? A person who can trace their lineage back to medieval monarchs, who embodies what we believe are the characteristics of the people of our nation, and who is quite good at waving and speaking to the public. (Danny Dyer springs to mind. No, stop it Alegrias)
But does that person have to be involved in government? Do they have to command utmost respect, irrespective of what they do? Do we need to have an intimate knowledge of their extended family and all their goings on? I don't think so.