As I understand, this could not be further from how this works. It was always obvious to me that votes would only be one objective factor among many subjective factors.
The discussion around Pinboard was somewhat polarized and tended to focus on the wrong aspects. I was partly guilty in that, but it's not great when the question mark is over whether or not you're serious, rather than over your business (having a question mark over your business is totally fine! that's the right kind of risk). And it was always obvious to me that the YC partners would do a final pass on selection.