This is false. First, men and women have different anatomies. A man cannot have diseases that involve female organs and vice versa. For instance, a man cannot have ovarian cancer simply because a man does not have ovaries. Second, there are some diseases that has gender predilection such as autoimmune disease (such as rheumatoid arthritis) more common in women and Parkinson's disease more common in men. Another is behavioral differences as a confounder. Men are more likely to have lung cancer because they have a predilection to cigarette smoking than women.
The charcoal produced by the burning of the woods provides nutrients for reforestation.