Cooking on a gas stove without proper ventilation is terrible for you. My stove didn't have a hood when I moved in, inspection didn't even call it out to fix. But I started getting dizzy and feeling sick in my house; and had to install air sensors before I realized it was cooking that was absolutely destroying my air quality. Like from 2ppm to 1000ppm down the hall in the office.

The whole "they're coming to steal your stoves" thing started for a reason, without proper ventilation to the outside (which just isn't that common in the US), cooking can destroy your lungs, even today.