While I can see the argument in that direction, the point he made was to "delete" the other post before reposting. Think of it like first drafts of a story/article/blog post you're writing, you almost NEVER get it right the first time. Sometimes it takes a few iterations (just like software development hmmm?) before you find the right combination to trigger a general interest.

HN, Reddit, Slashdot, all of these share similar requirements of "finding the right combo of post/title/content/etc... to appease to the wider audience".

What he recommends, I think is a worthwhile endeavor. As long as it is not abused...