You wouldn't have an e-mail account without authentication.

You WOULD have an e-mail account without knowing how password hashing works. You WOULD buy a car without knowing how airbag works.

If you think you know everything about every aspect of everything you interact with, you're so clueless you don't even realise.

I think it's worth making a distinction between knowing what password is and knowing how it works. I just think it should be on the list of security features of a service just like airbags should be on the list of features of a car, and people should have some idea of what it is and why it's important to have.

Of course, any site can claim to have hashing but not actually do it or implement it terribly. The same is true for airbags, but for that we have regulations....

This reply seems a little unhinged in comparison to the preceding comment.

The preceding comment suggested that using a website without understanding authentication is like buying a car that has no airbags. That's unhinged. You know those "IQ tests" where they go "the foot is to the leg like the hand is to the..." type analogies? This person would fail hard.