[zepto]

We already have general rules against fraud and other kinds of crime which apply to software just like any other product.

Only a very small set of products have special regulations, generally those which we deem unsafe for consumers unless regulated.

“Seatbelts. Stoplights. Nutrition labeling on packaging. etc.”

A good set of examples. Every one of them is about consumer health and safety. This is consistent with liberal democracy - people should be free to do what they want unless it hurts someone else. That is why all product related regulations are related to safety.

It seems reasonable to assume you are arguing for rules which prevent the installation of unsafe software on computers which are sold to consumers.

Apple would be the most compliant company with such rules, and would benefit greatly.