They dont have the capacity / expertise to authenticate cards which is why they launched the authenticity guarantee service in the US in the first place
Here are a few scenarios where opening might make more sense: You're Chasing Specific Cards : If youre trying to complete a set or looking for a specific high-value card, opening a box may be the best route

Return 4 Link Monsters from your Graveyard to the Extra Deck, and add 1 Jack Knights Paradion Astram from outside the Deck to the Extra Deck.Trader Exchange[3] Magic Exchange: Yeommu-ChungiReturn 1 Flame Dance continuous magic card from your hand to your deck, and add 1 Flame Dance - Heavenly Energy from your deck to your hand.During a duel using this skill, you cannot Normal Summon or Special Summon only Beast-Warrior type monsters (except for Special Summoning from the Extra Deck).This skill can only be used once per duel.Trader Exchange[4] Belz UnionSend 1 Bells monster from your hand or deck to the graveyard, and add 1 Bells monster from your deck to your hand.During a duel using this skill, you can only special summon Bells monsters (excluding special summons from the Extra Deck).This skill can only be used once per duel.Trader Exchange[5] Sacred UnionShow 1 Sacred monster in your hand to your opponent and send 2 Sacred monsters from your Deck to the Graveyard

In the One Piece manga, Kuzan, also known as Aokiji, is a former Marine admiral renowned for his ice-based powers and his strong sense of justice
The focus on having exactly 11 cards in your hand is pretty thematic and interesting in a quirky kinda way