One of the most important lessons in life, if you want healthy adults.
Loss is inevitable, shaking it off is learned.
Society has taken competition off the table. Learning to lose gracefully and using the disappointment to get better and win the next time you meet your opponent is a lost lesson. Sportsmanship is not taught to most kids anymore. To much video games and not enough team sports from childhood. Leads to what has become an “it’s all about me” younger group. IMHO.