Agreed, but Monsanto has dominance perpetrated by the state in the first place. This can be easily construed and rightly so as a monopoly considering their patent rights over seeds and the incentive farmers have to use their seeds, pesticides and herbicides.
Other companies may produce seeds, but compared to those companies, Monsanto is about 50 thousand times bigger than their second place competitor. This is a big deal and would not exist if the regulations, taxes and subsidization wasn't in place. That's the point being made.