The gas oven thing was so dumb because there was never even any mention of banning gas ovens and stoves. They just said that the fumes cause severe breathing issues and the ventilation for most gomes was drastically insufficient. Literally all that you have to do os install a proper fume hood. Most home just have a fam button on the microwave anove the range that blows air behind the cabinets
Maybe it is theoretically possible, but that would be 1/4th of their population ages 18-44. They would have to dedicate their entire economy to just supporting the army, no ither industry would be able to survive.