A noun plus "-(이)라" ("being X, since it's X") running into 어쩌다, almost always as 어쩔 수 없다 — "there's no helping it". It excuses something by naming the circumstance: sorry, I'm in Mungyeong so I couldn't make it; eighty percent of the talk is about food, so inevitably; the jeans I had to wear because the laundry was on; it's an occupational hazard, nothing I can do. One line varies it as 어째야 할지 — the culprit turned out to be a middle schooler, so I don't know what to do.