Btw, hobby farms are a thing. If you want people to be able to pursue hobbies in liu of work, you need a UBI. (Although, a smaller UBI would be suffient to allow for nearly viable hobbies like farming)
[0] scare quotes because it was fairly succesfull in its goal of segragation.
There are more important things in the world to think about than how to most efficiently stuff people full of mass quantities of cheap processed meat from suffering animals.
The onlything stoping individuals from farming if they want to is the resources to afford to do so while maintaing the farmers desired lifestyle.
In the past, farmers could get those resources by selling their produce. That became less viable as other models (read, factory farming) started to offer produce cheaper. If you want to maintain the old model, someone needs to pay the difference.
If you want to argue that animal welfare is something that we should value and requires collective (eg government) action to achieve, that would be a valid arguement. You could even argue that such a change would be to the benifit of small farmers.