That is a bold thing to say at a time when open source projects are being compromised by AI agents finding holes left and right.

But even without that, obscurity is and has always been a valid tactic, despite purists like you saying otherwise.

Most hacks are either this or being given the keys to said door by manipulating a key owner

No. It’s a valid tactic but needs to be part of a much broader strategy.

Absolute security is unachievable, but it is much harder to probe a black box to understand how it works than reading its entire manual.