How can you personally shine your light in a world where both horror and compassion exist side by side?

Does everybody have problems? It seems to me everyone’s always giddy and happy and going out with family and friends, no one seems to be lonely or sad I feel like I’m the only one with depressing problems.
How come some people say they are thriving with the work schedule as a nurse but others say they miss out on time with their families? Should 3 on 4 off be good?