Well, it's a good indication you chose to make a throwaway account for that post, as it suggests that you yourself are aware to some extent how uninformed and ignorant the question is.

But, to answer: These animals are brought up in very inhumane conditions -- in crowded spaces, with no light, no freedom. The whole process is unsustainable, what happens when the world population reaches above 10 billion and demand for meat keeps getting higher? Do we have enough space to keep these animals, enough food to sustainably feed them without having bad environmental implications?

It turns out there are alternative methods, and they may prove to be well worth the cost of investigating them. So here we are, doing science, in the hopes of a brighter future. Experimenting with food, to make it taste better, healthier, cheaper, more environmentally-friendly.