Several years ago, when Benedict XVI was still the reigning pope, Michael Voris put out an excellent Vortex that detailed why the Church had restricted the foot-washing to men. Since the current pontiff was elected, Voris has adopted a policy never to criticize the doings and sayings of the pope. However, he already did so, without realizing at the time what was to come. But the truths he stated in his video are as relevant now as they were then.
I post the video now. If it "disappears" please advise via comments - for once something is on the internet, it never ever really disappears.