Honey seems similar to milk - we’re harvesting a secretion. But I think vegans care about more than just killing animals - it’s also about enslaving them, for lack of a better word. Cruelty. And I don’t know enough to argue whether bees are free. It seems like they are - they leave their hives and then return. But their Queen does get moved around by the beekeeper and they are bound to her… its an interesting one.