Let’s make sure this isn’t a normative belief
If you draw out the tech tree, you argue why working on a suboptimal technology might actually lead to amazing things in the future. The evolutionary analogy would be “Why should we keep around these little hairy mammal things?” (See: Studies on Slack - SSC)
Drawing out the tech tree enables you to explicitly see the state of different disciplines areas and constraints on them
Drawing out tech trees makes unknowns explicit
An explicitly drawn tech tree helps see what you could be doing that you aren’t doing instead of working on the immediate adjacency
It biases work towards potentially more productive ends
At the end of the day this really does come down to a philosophical difference over whether you think that people can plan better than dumb chance. A definite worldview means you believe the universe is deterministic and Indefinite worldviews and definite worldviews enable exploration of different parts of idea space.