I'm well aware of farming practices and the justifications given for them. The justifications you've given for "diseased legs", farrowing crates, asphyxiation of fish, and so on, rely on the notion that rearing animals for meat is necessary in the first place. Same goes for the justifications of tail docking and teeth clipping without anaesthetic. You've not addressed this, because you can't; similarly, you haven't addressed whether you'd be happy with humans with a similar mental capacity being treated in this manner, because you can't.
The notion that this is "animal rights propaganda" is bizarre: it's pretty hard to actually get into farms to film them in the first place, and this is what they've found on farm after farm after farm, and in slaughterhouse after slaughterhouse after slaughterhouse. The scientific paper I linked to also cites a number of other scientific papers, some of which have found that the slaughter process goes wrong in up to 35% of cases. This isn't just a single finding.
I'm not a vegan purist, by the way. If people don't want to eliminate their consumption of meat and animal products, reducing consumption is good too. There's even a name for it -
reducetarian. Going lacto-vegetarian is also easier, in my experience, than going vegan.
Getting back to the topic of this thread, one would hope that, if and when cruelty-free cultured meat becomes available, even the "I like the taste of meat" rationalization will be dealt with.