Would you care if you had beef that was infected with mad cow disease? Would you suddenly have an interest in finding the source and isolated?
Most of the small producers would care. It would mean the end of their existence as farmers.
Farmers do not make money from sick animals.
This battle really seems to be between the cattle farmers (those who raise and breed cattle) and the beef producers (those who turn the cattle into meat). Both groups are pressuring the government to use its power to get their way.