So far we've got no evidence that industrial scale meat production has caused this, and the only similar hypothesis has been zoonotic spill-over - which has it's own trouble substantiating evidence, nevermind explaining how a disease perfectly mutated for human infection seemingly sprung up in Wuhan.
Leave the conspiracy theories at the door, wouldja? They're as nauseating as intelligent design and flat Earth.
Meat agriculture is likely the cause of the "Spanish" flu. When you cram zillions of animals together with their excrement and humans, you get pandemics by creating the conditions of high-density Petri dishes for evolution and rapid spread.