You can be opposed to unethical treatment of animals and child slave labor. If someone tells me they are against slave labor, my response isn’t ““buying products made by slaves is unethical” ~said by someone who eats factory farmed meat”. It doesn’t have to be one or the other.

I don’t think people go vegan because they want a moral high ground, at least I know I didn’t. People do it because they genuinely believe it’s the right choice to make. And yes, having that choice is a luxury not afforded to everyone, but vegans are no more entitled than the people around them who also have the luxury of being able to choose not to support animal agriculture, but do so anyway.

You say people don’t want to have a discussion while at the same time calling people who might actually engage in a discussion “self-righteous assholes”. This leads me to believe you may not actually be looking for a good faith conversation.