It is sometimes said that someone experiences this or that negative event. They take the time and energy to work through the problem in their own way. Apart from the purely physical and psychological repercussions of this stress, such as elevated cortisol or depression, the immediate effect is reduced productivity and the need to spend time healing wounds. This convinces leaders, even the least sensitive or those indifferent to the needs of other people, that unpleasant events in a team are something undesirable.
A productive team is a healthy team. A healthy team is a team with good relationships. Good relationships result from being attentive to the needs of other people. Mindfulness is empathy developed. Anything that helps to develop it is valuable to the organization.