I expect people born living in cities on the slope of a volcano don’t give a second thought to the occasional rumble or venting. I’ve spent time in San Salvador, El Salvador, and I asked the occasional local about it when I first got their. Their responses were almost always a shrug of the shoulders and an Alfred E. Newman, “What, me worry?” smile.
I think about how screwed everyone on Santorini would be if the smoking active volcanic islet actually went up. Right now the tourists take short trips to the swim in the warm waters. :^) There’s a slowly declining threshold of discomfort in places of this kind.