Well, friction and execution risk aren't exactly the same thing as I understand it, and it's not really "repurposing" the military term as much as it is using it in a broader context than it was originally used in. A lot of military stuff is simply one particular usage of some field: deciding how many subordinates a general should have is a military usage of organizational dynamics; getting bullets from the warehouse to the soldier is logistics; friction is simply a property of complex systems regardless of what the system is