Earlier quoted context omitted.
I'm not sure I buy your argument. For example, pigs have an average lifespan of 15-20 years but in a farm setting are slaughtered at 6 months old. Also I suspect a pig is more adapted to its natural environment than living in a confined shelter (often less than a square metre). In fact, in the UK, less than 1 in 20 pigs are allowed to go outside - hardly a good life! This is just pigs.
This visualisation was an eye opener. https://justone.earth/food/ Perhaps an individual animal suffering is less compared to a wild death, but the sheer volume has to count for something.
I'm not entirely serious about this. But I'm curious where the logical flaw is.