The argument against security through obscurity isn't that it doesn't work at all. It does to a degree, only it is not as strong as people think.
An example from the meat world: not publishing your vacation dates well in advance for the world to see somewhat reduces your chance of being burglarized. That is security by obscurity; not reliable, but not completely inefficient either.
But if you live in a fortress (security by key material), you can well declare your vacation dates without running the risk.
The phrase "security through obscurity" isn't an argument against all information restriction.
It doesn't imply we should, for example, publish step-by-step instructions for making widespread death easier.
Another „great filter“: How to handle dagerous information?
The argument against security through obscurity isn't that it doesn't work at all. It does to a degree, only it is not as strong as people think.
An example from the meat world: not publishing your vacation dates well in advance for the world to see somewhat reduces your chance of being burglarized. That is security by obscurity; not reliable, but not completely inefficient either.
But if you live in a fortress (security by key material), you can well declare your vacation dates without running the risk.