>>>Why is it that my car insurance Inhad in Texas transferred to Utah; but the medical insurance I have in Utah is NOT EVEN AVAILABLE in Texas
With auto insurance, you are just looking for a check to cover your expenses. You get to choose who does the repairs. With health insurance, you are purchasing access to a network of doctors and hospitals that the insurance company has agreed to cover some agreed upon costs. Your Utah insurer is not likely to have much of a network in Texas. This is why the ability to sell across state lines is overrated as a cost saver.
Insurance used to be that way. I paid up front for the doctor and then I filed the paperwork with Blue Cross to get 80% of my money back. Was a heckuva lot cheaper then.