[Diggsey]

This is the worst take...

People consistently misuse the Swiss cheese security metaphor to justify putting multiple ineffective security barriers in place.

The holes in the cheese are supposed to represent unknown or very difficult to exploit flaws in your security layers, and that's why you ideally want multiple layers.

You can't just stack up multiple known to be broken layers and call something secure. The extra layers are inconvenient to users and readily bypassed by attackers by simply tackling them one at a time.

Security by obscurity is one such layer.

[genewitch]

I've heard that Swiss cheese analogy when it comes to the seasoning on a cast iron pan.

Even if you have tons and tons of layers of seasoning, you still don't put tomato sauce or whatever on it.

[TZubiri]

So according to you, a picket fence or a wire fence is just a useless thing that makes things less usable by users?

Security does not consist only of 100% or 99.99% effective mechanisms, there needs to be a flow of information and an inherent risk, if you are only designing absolute barriers, then you are rarely considering the actual surface of relevant user interactions. A life form consisting only of skin might be very secure, but it's practically useless.