The mind is just as organic as the body, and we can’t generate drive out of pure will, anymore than we can walk out of will. Walking takes muscle energy, coordination and aptitude, and sometimes your body just isn’t up to it. Maybe your joints are acting up for no good reason.

Maybe one day psychology will have charted our mental systems well enough to build models that allow us to just “lean” towards a goal, playing the right self-tricks to minimize friction and maximize economy of effort.

Until then, applying to a goal will continue to be like herding cats: attention, distraction, craves, unconscious resistances.
And things like these schedules will help to train our drive like a muscle.