Experience Tumblr like never before
One of my headcanons is that KRS spent most of is carear as a team leader dehumanizing himself.
He was no longer Kim Rok-Soo but the Leader. He has more important things than having a break, or personal time. He was a fundamental piece of the machinery of the team and he needed to give everything to keep it running.
After all, he can't ruin the thing his hyungs died protecting.