Probably because you have not had to use proper language with which to communicate with production in sawmills, construction projects, and steel mills. I find your depth of ignorance to be similiar, therefore, probably the only way to get your attention is to state the POV in a manner that will get your attention.
There are millions of grid parallel systems all over the world, and you can plug your car, dryer, or anything else that uses standard voltage into them as you would on a standard circuit.
And how is it possible that you are such a good engineer and are ignorant of that fact? Or is it that you prefer to lie about it because somehow individual homeowners achieving a degree of economic independence for their homes and vehicles somehow does not agree with your political views?