No matter how much we love or care about people, understanding that we can’t always protect them from pain, and that their suffering is inevitable is something that gives us true perspective about how to deal with them when their suffering eventually happens .
If you accept that they will have to deal with difficult things that may be out of your scope of fixing, you would have relieved yourself of the most burdensome problem, your ego.
No matter who these people are to you, children, friends or coworkers, their suffering will happen, and the best you might be able to do is watch them overcome or succumb to it by themselves.