(Spain is somewhat of an exception, but Juan Carlos' abdication was linked to corruption allegations over shady business dealings in Saudi Arabia; I very much doubt Elizabeth had any such skeletons lurking in her closets.)
So, if the Dutch monarchy can survive it, why not the British? I think you are probably right about her own attitudes to the topic, likely irreversibly marked by the events of 1936. But I'd be surprised if the same is true of her son or grandson.
Her son and heir has literally been accepting suitcases full of cash from middle east despots (nominally for his charity), and her other son was up to his neck in Epstein's dealings. I wouldn't be so sure.
Note that this scenario may still happen, but she was extremely lucid to realize its salience:
https://time.com/6212004/queen-elizabeth-republicanism-anti-...