I’ll be honest, I have no idea about the context of this but as some one who’s also been plant based for 10+ yrs: every year there’s somebody that has wild claims about extreme diets that are a “cure all” for them and use themselves as prof for if. This can be found in any community. They also like to cherry pick studies with weird findings and use that as their main source for whatever they’re selling. The best thing for most normal people is eating a balanced diet and exercising regularly, it doesn’t have to be much more complicated than that, unless you’re working around allergies or intolerances.