At a high enough income level you are right that kitchens separate the oven and stove. However you'd be surprised how many high end kitchens will use a gas stove because it's often a better and more versatile cooking tool, plus natural gas is something America has a lot of and is very cheap compared to the Russian gas that many Europeans have to deal with.
Also, the poorest of Americans will use electric ranges almost universally because we can make electric ranges for the same or less than a gas range and the poorest of people live in places that don't even get natural gas copper piped through their place. They would just live without it and have electricity only.