A lot of people are concerned about factory farming too. And let's be real here, most of the time is significantly better than none of the time. People care more about sharks for a multitude of reasons ranging from the fact that they are endangered/threatened (where chickens aren't) to shark not being a common source of protein for the vast majority of the world (whereas chicken is, so it is a lot easier to turn a blind eye despite caring). These problems are rather complex and making them black and white helps no one.

Just remember, we can talk about one thing without bring up other things. Multiple things can be bad while some are more bad than others, despite all being bad. If you actually care about these chickens as you are so saying, then your goal should be to convince people to help you change the industry, not shame them. Shaming is just picking a fight and going to make people ignore you instead of listening. Even though it feels good, this is a terrible strategy for pursing your goals.