What Magnum photographers have taught me

What Magnum photographers have taught me and what I never noticed till now about Magnum photographers is how raw their photos are. The don't sugarcoat or glamorise anything. No fancy filters or post processing. Just raw images. I always thought to myself, their images aren't innovative in terms of technique, but rather captivating because of the subject matter and stories they are documenting. So what goes into making a great photograph?