Originally Posted by BarryL
Why not just use a cow hitch / larks head?
A cow hitch is fine if the sheet does not need to be removed/attached quickly and easily. You may want to use the same sheets for several different sails, in which case a soft attachment that is easy to connect/disconnect is ideal. Another scenario would be if a hank on jib is equipped with reef points; you can move the sheet up to the new clew. And thirdly, you can remove the sail (for trailering, for example) and save setup time by leaving the sheets rigged through their blocks and cleats/stoppers.
My boat fits all three of the above situations. As the saying goes, "different ships, different long splices."