I feel belief in the Bible definitely hinders one's intellectual capacity. I don't think it destroys it in all cases. I cite myself as one such person. Luckily, I chose to be intellectually honest with myself and examine evidence. A requirement of faith is to abandon this, along with logic and reason.
At the very least, as LisaRose stated, people of faith are mentally lazy. At the worst, they are willfully ignorant, intellectually dishonest. Some become extremist/fundamentalist.
At some point, every single person of faith is confronted with factual evidence that refutes their belief/faith. It is at this moment that a person must choose to be willfully ignorant and intellectually dishonest or accept the evidence and begin the work of figuring out exactly what their faith really means.They are forced to step outside their comfort zone or remain in it and become insular and stunted.
Just because someone WANTS something to be true, does not mean that it is.