I would say that you can be vegan and still be eating food that was shipped in on boats then trucks. Vegan would be a net positive for any switch from the conventional western diet, but I see the merit in focusing in on carbon footprint of the food in question. And as potentially silly as calling oneself a ‘regenivore’ is, it still conveys a message and invitation for others to learn about alternatives and things they might too value.
Note that is culture.