Yeah, these chickens are healthy, they might even be happy there. They could do a lot worse. If someone really doesn't like the idea of broiler farm chickens, they can pay a little extra for free range chickens. Or pay even more to buy them off a local farmer. Or just switch to something else entirely, there are plenty of alternatives available today.
I ask honestly because my first thought at the picture was that, If anything, it shows that the chickens have bad plumage[0] and are mostly sitting down[1].
For [1] my guess is either the animals pick on each other too much, or they are actually chicks that have grown in size faster than they should.
For [2] it may mean that they have weak bones/muscles (due to bad feeding, inflated growth and no movement) and that they are actually laying in their own filth.
