If it has a flue or chimney, it isnt really an open fire. Look at an ancient long house, or farmer's thatched cottage from say 400 years ago. They had a fire on a stone circle on the floor in the middle of the room, and a high roof sometimes with a hole but often not. It was smoky, but kept everyone warm.
I think before heating without smoke, it was perfectly sensible to smoke tobacco because it was the least bad thing you were inhaling on a daily basis, and you were likely going to die of lung cancer regardless. Makes sense we didn’t really discover the risk until after we stopped using wood burning stoves (or burning coal, like Laura Ingalls Wilder’s mother would to in Little House when it was available)
Sorry, it’s not a topic I know an awful lot about. I was talking about an exposed hearth with a chimney like in the article, as opposed to a cast iron unit that recirculates the air like a stove
There have been times, with various crises, where I only half considered if indoor plumbing was such a great thing. But that's probably a very old-fashioned New England thing.