InisnaBro - I agree. It really isn't a soap opera, though that is how it has been sold. Although monarchs have had PR machines for millenia - Roman emperors had their portraits stamped on coins; Tudor Queen Elizabeth I arranged for copies of her portraits to be sent all over England....
However:
If a country needs a ceremonial/diplomatic/symbolic head of state (which almost all nations seem to think they do) then surely it's better to have a figure who is above/beyond party politics. Otherwise there's the danger of getting people like Trump etc.
The problem is how to choose a non-political head of state. Look at the problems Italy has been having recently; the previous president begged to retire but has been persuaded to stay on for a bit longer, because they (Italian politicians) can't find/agree on anyone suitable to replace him.
Hereditary monarchy is definitely not a perfect solution to such problems, but the current HMQ has - since she was in her 20s - devoted her life to the job, as she sees it. Some may admire her, many others criticise. But in either case, how horrendous a job - a gilded cage: endless ribbon-cutting, meeting and greeting, an awful lot of travel, constantly on show, constantly judged, constantly guarding one's tongue, no personal privacy, no personal freedom, a vast and sometimes antiquated bureaucracy running one's life, self-seeking hangers-on, endless and often inaccurate media criticism with very little chance to reply, some influence, prhaps, but little actual power etc etc.)
Vast wealth and comfort, yes, but I'd rather be poor and private and free.