The important part is that it lets you move, even if at much slower speeds. The small nature and unambiguity of the first step allows the possibility for it to

The important part is that it lets you move, even if at much slower speeds. The small nature and unambiguity of the first step allows the possibility for it to beat procrastination impulses with lower willpower. Slow movement is better than no movement. Also it often makes it easier to pick up speed afterwards.