Just the opposite is true. Catholics remain Catholics because they have never developed any reasoning powers on the subject of religion.
You show complete ignorance of Catholic theological works, written by the cleverest men of the centuries. St. Thomas Aquinas had the Catholic Faith very deeply, yet wrote probably the greatest masterpiece of religious thinking the world has ever seen. Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty