Aborting a shallow sport dive is no big deal. But some of my acquaintances go on major expeditions doing deep, complex technical dives on shipwrecks and in caves. Just getting to the dive site can be a major logistical undertaking, and there's often a large group of surface crew and support divers just to assist the push team. Sometimes permits to access a particular site are time limited, or there's only a narrow window of good weather. So those exploration divers are subject to the same mental pressures to go ahead and dive even when it's risky.