I think there are some truths in them.
if we stomp our feet all the time, the counter energy/power/force from the ground would go to our tail bone area first, which is very close to our groin area.
meaning we are severely hitting or punishing our groin area, over time, we may become sterile or herniating stuff into the scrotum.
so how to practice "soft" landing would be very important, especially at young age.
just some thoughts.