> If you notice high energy use while cooking, are you going to start eating more salads instead?

Of course, why wouldn't you? If the assumption isn't that effectively unlimited power is available on demand you adjust use accordingly.

On sunny days with excess power maybe you charge and do laundry. On a stretch of cloudy days you avoid long periods of cooking or using large tools like sellers or air compressors.

Adjusting to our environment rather that chasing convenience is a very reasonable approach to makinh a real dent in reducing our environmental impact.