> just cutting meat farm subsidies

Most farm subsidies do not go directly to meat. In fact, current subsidies probably shift some land away from pastures and grazing to oversupplied field crops:

https://www.downsizinggovernment.org/agriculture/subsidies

You can absolutely be both against the farm bill and simultaneously in favor of reducing American meat consumption... But you're probably looking at corn and soy subsidies that in turn make cheaper feed, rather than something as simple and direct as cutting a meat subsidy.