I've met a number of religious people who were quite good at their technical jobs that required critical thinking skills. So long as the knowledge, skills and behaviors required of them don't clash with their identity beliefs, there's no problem in terms of performance.
Sure, but most of those fields don't require a carefully examined set of beliefs about the world itself in order to succeed. A logically inconsistent but functional worldview is usually enough. As an extreme example it's entirely possible to be an award-winning pediatric neurosurgeon while simultaneously believing that the Egyptian pyramids were grain storage silos.
Fields that require carefully examined beliefs about almost everything (physics for example) are a lot harder to pull that off in.
