All of that just seems like special pleading, and has no moral basis at all. "It's my culture" is morally equivalent to "I've always done it this way", tradition is just "My parents have always done it this way". I hope I don't have to bring any examples to demonstrate how often "culture" was horrendously immoral.

In the end, going vegan does require some amount of effort, at least initially. Guess what? If someone has gotten used to using LLMs for many parts of their live, it would ALSO require some amount of effort to replace it. You might say that veganism requires more effort atm, which I could agree with. But that begs the question: If AI lives long enough, will it suddenly become totally fine, simply because it's just as integrated into daily life as meat eating is?

Finally, "they need to eat food" is to veganism as "I need to learn" is to LLMs. In both cases there's better alternatives.