Good question, and a deep one. Personal suffering teaches us to appreciate the wonderful gifts of God like breathing, sleeping, tasting, seeing, eating, loving, kindness, hearing, touching, speaking, and so so much more.
My family suffered in so many ways like so many wonderful people have suffered on this earth, but we learn to appreciate the little things that are taken for granted, and we appreciate the goodness of love, or days without pain, or suffering.
I always pray for happiness for everyone on earth, and I pray that everyone can understand love. Your question is a fine one, and one that all humanity should ponder upon.
God Bless You Sweet, And Precious Heart, And Your Loved Ones As Well.