When we can turn off distress and pain in farm animals we would have done more to improve well-being in the world than anyone alive today. Factory farms stop being an efficient evil and become the only moral way to produce meat.
And as a side effect we also get super intelligence on a substrate that is 10 orders of magnitude more energy efficient than silicon.
Do you mean we'll input their brains with an alternate reality or just removing their pain and distress signals?
Regardless of the answer. Lab meat still seems more ethical, it was never a sentient being in the first place.