They were comforted and encouraged when they were young. When they grew up, they each became the best in their respective fields, realized their own values together, and worked hard to make more people happy and stable. They had sincere and kind hearts, and they could not bear to see more innocent people sacrifice. If someone had to bear the burden and move forward in exchange for more people's stability in this world, then they would rather it be them.
(Purely fictional, fictional history, no prototype)
Purpose: To pay tribute to the loveliest people who carry the burden for us