You don't have "AF" just as no one else does because the condition does not exist.
About these other people, how do you know they even had all the symptoms blamed on "AF"? How do you know their diets are not based on starvation? Do they mention how many calories their before and after diets are, because that's really the only way to know for sure.
Anyone can write how they had "AF" and changed their diet and lifestyle and got better. Unless they gave greater details, such as all the symptoms they had and how many calories their before and after diets were, it really doesn't tell us much.
As for hypothyroid, starvation can cause low thyroid and isn't the prevalence in gender very telling: