Firstly not trusting the brain in itself does more harm than good, as it gives way to paranoia and anxiety, and serves to be a very unhealthy mental disaster.
Secondly, there is much more to decision making in the brain than just intuition and the analytical part of function, as factors such as personality, perception stemming from the frontal , and gathered experiences and learned memory from the hippocampus work together as well and much more as the brain works in an integrated manner interlinking both conscious and subconscious aspects of the brain. But what the brain does best is learn from experiences, and it keeps doing so and the best way to maintaining a healthy life is to have a healthy brain, and a healthy brain demands trust and constant learning.
Thirdly recent evidences based on research suggest that the prefrontal cortex continues to get developed and shaped even until a person hits his 30’s while the other parts of brain continue to grow and develop which is where neuroplasticity also finds its role through out our life(Hötting & Röder, 2013).
If you guys want to further understand my comprehension,refer to this article, hope it was helpful:). Reference :
Hötting, K., & Röder, B. (2013). Beneficial effects of physical exercise on neuroplasticity and cognition. Neuroscience & Biobehavioral Reviews, 37(9), 2243-2257. doi: 10.1016/j.neubiorev.2013.04.005
Mullally, S., & Maguire, E. (2013). Memory, Imagination, and Predicting the Future. The Neuroscientist, 20(3), 220-234. doi: 10.1177/1073858413495091