Um...say what? Denying evolution is counter to scripture in your view? Surely you can't be serious. Believing in evolution is counter to scripture.
>>Why should these be denied any role in matters of faith and moral reasoning?<<
Because man's heart is corrupt that's why.
Jeremiah 17:9 "The heart is more deceitful than all else And is desperately sick; Who can understand it?
Mark 7:21 "For from within, out of the heart of men, proceed the evil thoughts, fornications, thefts, murders, adulteries, 22 deeds of coveting and wickedness, as well as deceit, sensuality, envy, slander, pride and foolishness.
Man's "reason" is why America is in the deplorable situation it is in today.
Read fairly, these and other passages demonstrate God's call for us to exercise our capacity for reason.