Definiteness means that you have a long-term plan but that doesn’t mean that plan doesn’t change. It does mean that when that plan changes, it maintains a long timescale.
This stands in contrast to an indefinite worldview where there is no long term plan in the first place.
In hindsight, both the indefinite and definite approach end up looking like a walk through The Idea Maze . That is why the contrast between definite and indefinite worldviews has to do with their approach to the future.