Because "farm Inc" has a massive horde of wealth, they can stamp out competition by either buying them out, cutting them out, or driving them out of business with prices a small farmer can't handle. After that, they get to set and raise prices at will with the now smaller pool of big name "farm Inc".
This literally happens every time a market is poorly regulated and businesses allowed to grow too big. It's the natural end state of capitalism.
You should read about who the luddites actually were. They were not opposed to technology, but to poor wages, low quality goods, and workers being replaced. Capitalists destroyed their reputation with propoganda.