The 'logic of the larder' would sway literally no one I know, not just vegans. It's usually a question of not contributing to factory farming, not some abstract thing about suffering in general, and in some cases a diet that worked after health issues and they kept to it.
This is a thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. The previous "stupid" questions thread is at almost 500 questions in about a month, so I think it's time for a new one.
Also, I have a new "stupid" question.