Most wheelie bow shooters shoot expandable broadheads that fold up into something more like a field point so it doesn't take much to hold them in place in a bow quiver.
The arrow point has to be held someplace to keep the heads from banging into each other and the arrows straight in the quiver, whether in a strip of hard plastic or foam. Once you've made a channel in the foam, it's pretty easy to slip subsequent shafts in and out. Regardless, all fixed blade broadheads move against the material that holds them in place and need to be touched up periodically for that reason. Really not that difficult.