The meat industry helps keep humans alive however, whereas the AI industry does not. I think the argument between the two needs to factor in the actual reason for the emissions.
Eating meat is ecologically unsustainable but it has an actual reason for it to exist.
Eating meat is not necessary by any means to 'be alive' in fact many studies show that a plant based diet is better for longevity. So, in the same way that AI is not 'necessary' to do a job, it's not necessary to eat meat. It's a matter of taste and societal conformity/norms.
We didn't get to where we are as a species without it.
We didn't get to where we are as a species without violently killing each other, or forcing people do to work for us, or killing our young, etc. Doesn't mean we should keep doing it.
Friends have described scenarios where ai has literally saved their life. Like, they were trying to commit suicide, they had no one human to talk to, but they did have AI.