I’ll give it a shot anyways, to play devil’s advocate.
I only buy a vanishingly small percentage of the amount of meat produced by factory farms every year. So I feel the same percentage responsible for perpetuating that system, which isn’t nearly enough to keep me up at night.
Snopes has an article on it, and even they couldn’t come up with a solid number.
https://www.snopes.com/fact-check/china-apartment-building-residents/