Yeah, it's not an accurate assumption, unfortunately. However, a corporation is largely limited to ruining my life in a civil lawsuit, while the government gets a whole toolbox of nasty options to use.
W... what? N... no, without a government there (or at least without an armed body of individuals or somethin' willing to enforce such limitations, which amounts to the same thing), that whole toolbox gets opened to the corps (and everyone else besides), and often more beside due to the simple dint of having even less impetus to listen to the general public than most governments do. Some significant portion of the reason we even
have government is specifically to keep that toolbox
out of the hands of less tractable systems of organization (such as, y'know, businesses). No government, and anyone with the ability to manufacture that mustard gas gets to get rid of that inhabited building they want to build over, if they're unethical or powerful enough to not care and/or not be stopped. And there pretty much always ends up being at least one.
Really man, if there's two things american (/world) history has taught us it's that we
really don't want to let businesses off the leash, and that local resistance to them is often not
nearly enough to stop 'em. Advocate for anarchy or minarchy as much as y'please, but for the love of the nonexistent gods de facto corporatocracy is not the way to go. At least in a system like ours a politician has to at least
ostensibly worry about being reelected. Unfettered business just has to worry about whether they can acquire people to kill or cripple everyone that tries to stop them.