Endus, this is blatantly false information. You can send classified information over any secured channels approved of by superior officers who have prevailing authority over that information. Just... ugh. You act like no one in the military ever sends anything via email (hint: we're all given secret clearance at a minimum and even BASIC training ops are considered sensitive). I get you're crusading right now pretty hard but don't add blatant lies to the equation.
/sigh