There is a distinct difference between being born naturally, or living a kind life free range, and suffering for a short period, than being bred for industrial purposes. Industrial breeding usually means male and females of the species are separated and artificially inseminated, the mothers are separated from their offspring, male animals are routinely killed or used for young meat, female animals are forced into often crowded conditions and given antibiotics and hormones to grow faster. This is not the pleasant life, it is slavery from the beginning with a most cruel end.
Not to mention that the breeds we raise for mass production are now Frankenstein creations that could never survive in the wild. A lot of broiler chickens can’t even walk because they’re so top heavy.