I'll grant that if you're optimizing for error correction, it's a perfectly suitable solution. I'd even go so far as to say that's exactly what Apple was going for when designing this. Even so, I really think this is a case where showing that this is an option would be valuable. When I see a split keyboard, I assume that I need to press the keys where they're displayed and frequently have to slow down my typing to figure out which side of the keyboard the key is on. It's nice to know I don't have to do that.