Curiosity is interesting, but not for its intrinsic value. Rather, it's a follow-through on curiosity that merits attention.
For a given decision, there's a finite amount of time for which it's useful to sit down and think. Beyond that point, the brain doesn't produce any additional useful, distinct outputs. Then, it only makes sense to do one of two things: seek further inputs, or execute on a choice.
Continued rumination produces nothing valuable.
Love, over fear
Invest time with love, not fear. Fear inspires uninteresting outputs that are shallow, superficial. Love incites work that is notable; self-evident in attention, care, passion...
Constraints are necessary to create meaningful output (in products, intelligence, personal growth...).