I wouldn't be surprised if they didn't understand that testosterone can't be 'supplemented' in the normal sense because of how it operates. If somebody gets a testosterone supplement, your own body will stop producing testosterone. And if you ever stop taking the supplement, your own natural production may never return. So it's often a one-way trip. If you're on t-replacement, you're on t-replacement for life.

An army that would fall to pieces without a constant supply of testosterone supplements is probably not going to be the most effective fighting force.