Why compassion for other's weaknesses, shortcomings and faults?

Why compassion for other'’ weaknesses, shortcomings, and faults? I just read a simple and good answer in Catching Fire (2nd book in The Hunger Games trilogy, p.32):

"Because sometimes things happen to people and they're not equipped to deal with them."

Too often we hold people to the standard of our own preparation and abilities when the truth is not all are equipped the same. Compassion creates space to learn and become equipped. Judgment creates no space, and only demands immediate compliance.