I agree completely, just use the normaly speed-up-and-stop with the rod tip and you can cast 9ft of leader with a 8wt or 9wt rod. The rod must flex only enough to cast the very light leader however, the rod has mass and that will cause a flex or load of the rod and if you stop quickly the rod will unload and launch the leader.
Most of us do the wiggle test to flex a rod in the FF shop, this is all we need to cast a leader with almost any rod. I find it easier to cast with more side arm when casting very short amounts of line or only the leader. Short rod path (short stroke) and quick speed-up-and-stop,,,,,a little practice and it will become easy.