Because fiddling with advanced statistics can help you rationalize banning something you don’t like.
Pollution, as a whole, causes a quantifiable number of premature fatalities. Wood stoves put out a quantifiable level of pollution. By reducing the pollutants produced by wood stoves, they conclude they have reduced the pollution-caused premature fatalities by 360 to 810. Apply the Leftist imperative to “do something”, and they proceed to ban sale of wood stoves producing more than the legislated quantity of pollutants. Never mind that unintended consequences might lead to more premature deaths than the statisticians concluded they are preventing...
There’s no end to meddling if you have a motive for it