We humans become better with pain. The reality of life is that it is full of pain and misery. Most of us surrender to it, become slaves and sick, and continue to accept it as a part of life and die.
While pain adds patience and willingness to go against all odds for survival, it makes us more realistic. We start seeing things as they are. We start observing our thoughts and take action accordingly.
Many think surrendering is the best pain avoidance method instead of moving forward and accepting it head-on. The reason is that we are aware of the pain but scared of suffering.