I did forget to take into account that some people are vegan because they have to be for medical reasons which is fine, know what your body needs to be healthy.
But people do often forget people are different and sometimes just straight up have the wrong idea on what's good and bad.
For example, my partners mum, who's hardcore vegan keeps insisting that I go on a gluten free diet saying that it helps lose weight, I've tried pointing out that because neither of us have "Celiac disease" the amount of gluten I eat will chance nothing and she has no reason to be gluten free either, but I gave up trying to explain it a while ago.
Best advice for what's best for you? Talk to your doctor.