I agree that the battle should be focused towards the ultraprocessed calories in calories out propaganda, after all, how many vegans and carnivores are there compared to everyone else on a western diet.
Nonetheless, I personally consider there's an anti-humanist component to veganism (whether most vegans are aware of it or not). I could not ethically recommend this diet to my patients, knowing full well I'd be giving them a suboptimal diet with possible future complications like oxalate overload and nutritional deficiencies.