Hm.
I met one of agentxs's friends, who is vegan purely for health reasons and is probably the only vegan I've ever met who's willing to sample the broccoli in sauce from an otherwise meat dish.

agentxs has been allergic to milk products all his life, but if I recall he eliminated meat while still quite young, and by the time I met him not only would eat no product made from nor by animals but would wear no wool nor silk, let alone leather. The US immigration vaccination requirements posed a challenge, as some are grown in egg. I think he successfully fought it.

So I don't know whether he'd agree with you that he started down the path for health reasons. As far as I've ever understood his motivation's been from an animal welfare perspective.