Which itself is a problem because the threshold is so low. By even the most conservative estimates there are thousands of people visiting the site every day yet it only takes a handful or so to get an item to the front page.
So even if 99.5% of the people here make a "strong commitment" as you put it the front page will still be flooded with all those TSA stories
As you say, currently there's no way to say "there's nothing interesting on the front page" even if a majority think that.