That does not make them useless though.
This offers the quickest healing for F2P players.
This recovery rate is doubled at level 50 Agility.
It can be more useful if you go to a place that has a Bonecrusher effect like the Catacombs of Kourend or if you have a Bonecrusher necklace.
That means you will need to use Stamina potions the Graceful outfit is also helpful so you don't run out of running energy eventually.
You will stop failing this agility course completely at level 91.