The safer and easier and more comfortable the civilization, the more aberrant iterations of human offspring. It seems paradoxical, but it makes sense: humans evolved to endure hardship, to fight, and to compete; thus eliminating to some extent the oddballs while keeping population numbers at a sustainable level.

This problem has been intentionally compounded by vaccines, chemicals, poor nutrition, hormone-disruption, cultural degradation, and more.

These bronies are the hormonal equivalent of a 'really masculine girl.'

But hey, at least they're not breedin'!

You just probably wouldn't want them on your side in a brawl.

They're not doing society any favors by indulging in this silliness, and shirking their manhood.