Yes, I've practically verified it. The conclusion is that it doesn't matter whether a human player or an AI player encounters a particular event; it will still trigger, but the cyclical nature will remain. There was also another similar question that required testing (please excuse me, sometimes I really don't have time to check something, and I just don't get around to it – but what if someone already knows?).
Question: Geographical event (blue circle). Can you configure it to "cancel after the first visit" or not? If the event has "guards" configured, and the player who visited the event was unable to defeat them, does the event remain? Does the number of guards change? Otherwise, it's possible to have an absurd situation where an event is "guarded" by one thousand five hundred Azure Dragons, but it can be bypassed simply by sending a Cossack with a single skeleton ahead. Is that correct?
Also, I'm interested in (but I don't even know how to check) – does the "Diplomacy" skill and the artifacts associated with it only affect the surrender price, as stated in the description, or does it also affect the probability of monster loyalty? And when the game says that monsters want to join, is it just a random occurrence, or does diplomacy only influence the situations where "monsters want to join for a certain amount"?