Is it true that if people stay in their own world (circle) for a long time, they will ignore the sufferings of others and will not see people who have no intersection with themselves?

In a way, yes. Because a person stays in his own circle for too long, he will become less concerned and unfamiliar with the surrounding environment, and over time he will become less concerned about people and things unrelated to his own circle. It is suggested to go out of your own circle as much as possible and see the outside world, because after all, this world is wonderful and interrelated, and everyone's circle cannot exist in isolation. Get in touch with people in different fields, broaden your horizons and enrich your connotation.

Finally, have a nice day!