I'm personally vegan for ethical reasons, not health reasons. I wonder how many people actually go plant-based for health reasons, I doubt it's the majority.
"It should be remarked that, in the majority of the cases, people adopting plant-based diets are more prone to engage in healthy lifestyles that include regular physical activity, reduction/avoidance of sugar-sweetened beverages, alcohol and tobacco, that, in association with previously mentioned modification of diet [62], lead to the reduction of the risk of ischemic heart disease and related mortality, and, to a lesser extent, of other CVDs."
"It has also been described that vegetarians, in addition to reduced meat intake, ate less refined grains, added fats, sweets, snacks foods, and caloric beverages than did nonvegetarians and had increased consumption of a wide variety of plant foods [65]. "
I know about 20-30 other vegans, and literally all of them are vegan for ethical or environmental reasons. None of them do it for health reasons, otherwise vegan pizza, vegan hot chocolate and vegan muffins wouldn't have been a thing.
My experience is also just anecdotal of course. And it might also be a difference in culture or country, perhaps.
Good to know, I didn't know this was the case. I wonder if going plant-based makes you more prone to engage in healthy lifestyles, or if having a healthy lifestyle makes you more prone to go plant-based.
Again, this doesn't negate the research on "diet X", but it does make coming to a conclusion more complicated.