Yes, I know, that's the whole point. The mistakes that most people (including yourself) are attributing to the dots, are actually usually caused by human carelessness -- spelling errors, mixing up gmail with hotmail, "dave" instead of "david" etc.
I made (and corrected) three further typos writing my correction.
But the point remains that what I'd originally intended to show was that local-part email addresses which read differently, and in cases quite differently, but are identical save for the location of the dot, are treated identically by Gmail.
And that in different contexts this might not be clear and/or lead to confusion.
It's spelling errors, not the dots, that are usually the source of misdirected emails (and also, wrong domains).
Kind of ironic that you proved the opposite point of what you intended.