It was never an analogy. I'm saying that a website should be like a website. Just like a book is like a book. And like books, websites have a purpose that determines their design.

A website can indeed be many different things, but a lot of websites have very similar purposes, so it makes every kind of sense that websites with the same purposes end up looking similar. Just like cars look alike. Or houses.

Of course websites with a different purpose are going to look very different.