Well a factual occurrence is what I and my husband personally experienced raising these birds. It’s not an opinion - it actually happened. My opinion is these birds are not a great choice for the first meat flock. The facts are they grow at differing rates, some did not survive it, and they can be culled in 6 weeks.
At least in humans, I believe we do too much of this. We treat the symptoms, but not the cause. For example, if someone has a peritonsillar abscess, resulting in a sore throat, fever, etc, you can give them advil for the fever, and cough drops for the sore throat, but it won’t do anything to treat the abscess (speaking from personal experience. Once you get the abscess drained, it’s instant relief. After the pain from procedure wears off, that is)