Without pollinators we would have a lot less food on our planet. It is said that humans would die out if the bees did. While this is probably not the case, the human population would still be severely reduced.
Bees are in trouble, and we still aren't fully sure as to why. Don't step on a bee day is to remind us just how important bees are to us. At the very least, I wouldn't like honey to disappear from my life.