I'm sorry, I have no patience for "rich man bad" takes on copyright. Copyright law protects the smallest against the biggest. If some company comes and steals

I'm sorry, I have no patience for "rich man bad" takes on copyright. Copyright law protects the smallest against the biggest. If some company comes and steals my product and outspends me on marketing, how do I fight back without copyright law? Say someone stole the book I wrote and passed it off as their own - how does open sourcing it help me? The chief purpose of the DMCA was to clarify legal liability and penalties for digital copyright infringement brought on by the disruption of the internet. How does that keep anyone rich? Who is that taking money from? Who is made poorer because people are able to create and sell their own works in the manner of their choosing?