Tossing an $0.02 but if anything changes in the conversion that would require an update to the HTML to facilitate, you're going to want that.
If publish HTML is unchecked and you do an actual publish the HTML will not be generated. However if you do a test movie(CTRL+enter) then the html is still generated. We already have a bug on this, and will look at this for the next update.
Game, set and match good Sir.. Good to know.