There are plenty of other people posting about the meat industry. I've seen people making the same comments on places. It's also in part because many people are just seeing the vegan circle jerk community posts on the all feed. That also shapes perception too
One example of someone complaining about just that on someone else's post (comment ended up getting removed by a mod because of other parts of their comment, but you can infer based on replies) https://lemmy.ml/post/16139346/11287396