it's the exact opposite. microwaves heat everything, nothing gets very hot usually around 70c. the idea that water gets affected more is also a myth. when you heat something from the outside in the outside gets much hotter especially when you fry it. cooking also releases loads of carcinogenic particles into the air which you don't get from microwaving. indoor cooking is actually quite a bad idea and you should really have mechanical ventilation in your kitchen or your home will have bad air quality for hours after cooking.
Netherlands