Yeah...none of that is true. Onshore wind is the cheapest power generation. Photovoltaic is second cheapest. Methane is leaky and raises your risk of asthma and cancer. You do not need to be tied to an electrical grid for anything with solar panels and batteries for energy storage.
for cooking and heating? It's worse for cooking, that shits like the equivalent of sitting in a garage with a small combustion engine running, as for heating, it's only nice if you don't use a heat pump system, and if you're using a heat pump, you might as well throw in a solar system.
Modern gas based furnaces still require electricity to run anyway.