Actually that's exactly what I just affirmed. This seeming difference in perspectives is because it's not intended to be an 'either/or' observation, but a 'both/and'. In addition to what you are saying, the secondary point is that the military is supposed to uphold and serve civil society, to the extent possible. They are here to dominate enemy combatants, not us. So while being effective, they should also fully respect the role and rights of citizens (to the extent possible) while accomplishing their mission/s.

[add] i.e. they had a CHOICE as to where to put it, and all the above (citizen's rights, Congress' guilt) + optics may have been partly why they chose inside the fence. Just a speculation in response to your op.