Warfare is changing. We need to adapt, else we’d still be fretting about buying the right sabres for the cavalry or worrying about the armour belt thickness of a Battleship. Pointless having a battalion of muscle mechanics the wrong side of the apocryphal river if a pop tart eating cyber nerd with relationship issues and a heavy metal T-shirt can infiltrate your ever more networked systems and get your own FIRES to drop on you. Tip of the spear stuff will always need excellent physical conditioning, but, increasingly, the brain is as, if not more, important. Looking at the sort of person who is an expert on this sort of skill, marching up and down the square is unlikely to attract them.