To be clear, this is a wild avian virus that jumped the species barrier to numerous mammals in the wild now, including marine mammals, with no relationship ever to farming practices.
Yes, factory farming is gross and dangerous and a disease vector. Currently, though, it is likely the only vector through which this virus is being monitored for a potential further jump to humans.
The vegan argument that keeps cropping up here is not much more than a "tisk tisk, you deserve horrors because... (X)". In each of these posts you could replace farming practices with overpopulation, spread of humans into wildlife populations, global warming, overuse of antivirals/antibiotics, ventilation systems, air travel, large religious gatherings, or people not wearing masks all day every day.
My point is just that responding to a post about a virus jumping species by writing a public service announcement implying that people have brought this upon themselves because of your pet cause "X" is basically the HN equivalent of the guy with the sandwich board saying REPENT THE END IS NEAR.