If it is true that the purpose of this event is to show entering into adulthood - then it is a sad reflection on what they are teaching their children and yound adults.
Why teach and celebrate that as an adult you can find a helpless, friendly creature, trick it into allowing you to catch it, overpower it with many people ganging up on it, hold it still while someone cowardly cuts its neck while it cannot even defend itself. All involved should feel ashamed regardless of it being a long standing tradition.