Forgive the over-simplification. At the time the question was posed he was a house-mate, assuming he was of limited means and unable to live comfortably as an independent person. In this circumstance it is understandable that he would lean toward a system that seemed to provide him more benefit, if only by removing benefit from others.
I would guess that as he improves his lot in life and earns his own, he will stray further from his old ideal and toward libertarianism.
Besides violence and secrecy, we also have negotiation. One could negotiate for protective services from an established body. One could pay a sovereign territory to establish separate legal orders like the Amish have. Lots of possiblities besides violence.
It’s not too difficult to defend ourselves from other like sized groups but none of us can anticipate having the potential to defend from missile attacks. There are certain antagonists we will have to avoid (secrecy) or pay off (negotiation).
Secrecy is no security at all. Americans who thought that secrecy was going to protect their Swiss bank accounts had a rude wake up call recently.
You’ll find that a large number of articles on LewRockwell.com for example are about gun ownership. None of them are about keeping secrets. There’s a reason for that.