Liz was resilient and she had more than a few knocks during her lifetime. Charles is well meaning but somehow doesn't seem to have the gravitas needed. And then there's William.
If, as some are suggesting, he has had a lot to deal with, yes of course he has, but so have many of us, emotionally, financial, and health wise etc., and many are posting here having survived and got through it without the support of an endless money supply and all that jazz.
William is NOT resilient IMV. He doesn't seem to want to shine as the future Monarch. Just a feeling I get, and perception counts for a lot these days (and in the past too) when judging the behaviour and attitudes of those in power with vast wealth, who represent us as our Head of State.
If we had a President, there would not be a million or so family members hanging on and similar millions of castles, manor houses, hunting lodges, estates, and Duchies to administer either. Just the President, his or her spouse, the staff, and a formal residence.
And before anyone cites Trump, forget that, he is not a titular HOS he has POWER, as does Macron, but there are so many other examples of Presidential HOS that are subtle, relatively inexpensive to run, and effective. Oh and democratically elected too. It's not the worst thing that could happen, since I think the RF is sliding down to the slough of despond now.