I’d argue that the problem isn’t so much saying that you’re a vegan because X, Y, Z, but that very often vegans extend that to moral judgements about people that aren’t vegan, without accepting that there are reasons someone may not wish to be a vegan. Y’know, god forbid that you tell a vegan that you hunt your own meat, and only kill/eat invasive species that are disrupting the ecosystem, like feral pigs, or lionfish in the Gulf of Mexico.