When reading Issue 347 of The Batch earlier I came across the following

The vast majority of people find speaking and listening much easier than writing and reading. Because most developers are highly literate (and so are readers of The Batch), it’s easy to forget how hard many people find writing. Indeed, children who spend time with adults will automatically learn to speak and listen, but unless they are taught explicitly, they will not learn to read or write

The bit that really made me stop and think was

children who spend time with adults will automatically learn to speak and listen, but unless they are taught explicitly, they will not learn to read or write

It’s obvious now I’ve read it. But I’m not sure that’s something that had occurred to me before. Interesting!