Yup. They do. Not only are corps legal fictions, they’re supported by IP law and a whole host of regulations that allow them to grow to such massive sizes. Limited liability is cancer.

and either don’t consider at all what happens without a government if people break the (quite arbitrary, but they don’t think that) rules of capitalism

Of course it’s considered, and there are a handful of possible solutions.

believe whole heartedly that government regulation is the only reason why either guns, private arbitration, or smart contracts haven’t already solved that problem.

Trade is a technology. Force freezing human economic interactions into rigid capitalist guidelines prevents actual development. Some people would just like to see problems solved without violence.