Earlier quoted context omitted.
Nah, considering one has well understood risks and has been practiced for thousands of years, while the other approach is brand new, I think it's reasonable. It can also be a selling point for lab-grown meat, the fact that it is safer and free of bacteria.
Our modern way of raising animals for slaughter is just that - modern. Not thousands of years. We have not been pumping steroids into the meat we eat for thousands of years. We give our food substances that fatten them up as quickly as possible, and we're surprised we're getting fat.
Isn't obesity rather well explained by cheap easily available food, carb heavy diet and increasingly sedentary lifestyle?
Otherwise, cows grow to much bigger than people, much quicker than people do. Why don't their natural growth hormones affect us in the same way?