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.
Note that this scenario may still happen, but she was extremely lucid to realize its salience:
https://time.com/6212004/queen-elizabeth-republicanism-anti-...