Gas stoves (like everything else) have pros and cons. CO2 emissions are certainly a major con, which is why my next stove will be an induction. I got a gas ten years ago because induction cooktops were not widely available and the cook quality of gas is far higher than non-induction electric, and I cook a lot and really need quality tools.

Facts matter, and it doesn't do anyone any good to paint something as "extremely bad" without balancing all relevant facts. Acknowledging that gas stoves are often (but not always) bad for indoor air quality is part of that.