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If you spent more than 3 seconds reading what you post, you’d realize that fecal transplant only affects the gut microbiome, not body-wide resistance. Fecal transplant, obviously, does nothing to combat pneumonia, skin infections, abscesses, or literally anywhere other than the gut. As the vast majority of fatal or life threatening infections are not isolated to the gut, your argument fails. But I need not argue against citations, as the provided papers don’t even argue your point.
This is belied by the fact that one of the most common elective procedures for men is a vasectomy. It (actually) has more to do with numbers. In men you have to block millions of sperm- in women it’s one egg. Physiologically, it’s an easier problem to solve in women.