"Reason is, and ought only to be the slave of the passions, and can never pretend to any other office than to serve and obey them." - David Hume in A Treatise of Human Nature
Analysis can be rational, but it cannot provide the impulse to act, the decision itself, and the judgement of what we ought to do.
Modern economics is one area where expectations that human are purely rational is having to be modified https://www.theatlantic.com/business/archive/2013/01/the-irrational-consumer-why-economics-is-dead-wrong-about-how-we-make-choices/267255/ In particular, decision making involves cognitive loads, which in every day life people usually choose to minimise.
Research has shown that to a great extent we use post hoc rationalisation (a good summary here https://www.skepticink.com/tippling/2013/11/14/post-hoc-rationalisation-reasoning-our-intuition-and-changing-our-minds/), coming to intuitive decisions and only then rationalising to justify them. This has been linked in Thinking Fast And Slow to our need to be able to reduce cognitive loads. When we have both the need and the time, we can use slower more careful reasoning. But in many situations it's more efficient to rely on quicker analysis and judgement, and it may be lifesaving - so go with strong evolutionary selection. Interesting insights can be gained from research on split-brain patients who had their brain hemispheres disconnected, where post hoc reasoning and multi-agent consciousness is especially apparent. Seeking consilience, the tendency to rely more on perceptions from multiple senses or sources, and different brain processes, helps understand how intuition tries not to float free of analysis.
Nicholas Christakis talks about the evolution of a 'social suite' which seems to be the basis of our morality, in this podcast on Humanity, Biology, and What Makes Us Good https://m.youtube.com/watch?v=VkUFthM6n5o
Patricia Churchland, one of probably the most influential living philosophers, has been developing the field of neurophilosophy. This specifically addresses the origins of moral intuitions, and of conscience. Hear more in this podcast: Conscience, Morality, and the Brain https://youtu.be/ktIk93tKfcw