How do you suggest people change a massive, incumbent, dominant animal ag industry married to the government (e.g. billions of subsidies per year, ag-gag laws)

How do you suggest people change a massive, incumbent, dominant animal ag industry married to the government (e.g. billions of subsidies per year, ag-gag laws) without changing personal attitudes about animal ag and consumer level behavior? And why can't they do both at once? Animal-free products from nut milks to meat alternatives are a growing industry, so clearly something is working without having to somehow do the impossible task of changing the government and doing it independent of popular opinion.