Watching Marin Ireland’s new play, “Pre-Existing Condition,” I couldn’t help but think of those Feeding America ads that have popped up everywhere in recent years, flashing AI-generated faces representing everyday folks to remind us that, according to its statistics, one in eight people suffer from hunger. The protagonist of “Condition,” referred to simply as A, is not starving, at least not for food, but she’s having trouble finding empathy and support in the aftermath of a different ordeal.