jeff bezos is a monarch. he has an empire with people doing literal slave-work and practically untouchable by the judicial system. if you are not willing to overthrow him now, you won't be willing to overthrow a "literal" monarch. same goes for every billionaire.
as there are middlemen protecting the billionaires now -like mass media, military industrial complex, heavily armed local police, union busters, corrupt judicial system etc.- there will be middlemen protecting the monarch then.
you think you would be willing to overthrow the monarch because it's not real, a fantasy. but you're willingly turning a blind eye to the exact same thing that is real and happening right now.
and as if like there will be one monarch to rule them all! all by himself, waiting by the dock, preparing for a duel.
just because we don't officially call it monarchy, people think that it's a whole new system. every critique you have against monarchy is valid for the billionaires and vice versa.