My take on the walrus knocking on your door versus a fairy knocking on your door thing is that I don't believe in magic or fairies whatsoever and I'd still be more surprised by the walrus. A fairy knocking on my door means I've made one bad assumption about how the world works; a walrus knocking on my door – in Saskatchewan, in February – means I'm wrong about a great many things.
As an aside, I feel like a lot of the folks on the "anyone who wouldn't find the fairy more surprising is a superstitious moron" side of the argument are operating under – or, at least, have chosen to adopt – a very particular set of assumptions about what a "fairy" in order to justify that position. "The fairy is obviously more surprising because its existence would oblige us to rewrite all of biology and physics" no, it absolutely would not. A fairy on my doorstep is one data point, my guy. Upending one's entire understanding of the universe on the basis of a single isolated observation is not how we do things. Walruses, on the other hand? We know how walruses work, and this isn't it!
Look.
I'm a middle-aged trans queer.
There's a fairy on my doorstep multiple times a day, minimum.
It's not my fault the poll didn't specify.