(Bloomberg) — Rakuten Group Inc.’s chief dismissed skeptics who call the Japanese e-commerce pioneer’s mobile foray a mistake and said the telecom arm is central for future growth through artificial intelligence.Most Read from BloombergNYC Commuters Get New Way to Dodge Traffic: $95 Helicopter RidesHow Sanctuary Cities Are Preparing for Another Showdown With TrumpScaramucci, Ackman Donate to Whitney Tilson’s NYC Mayoral RunWhat LA’s Fires Mean for the City’s Housing ShortageDeadly Landslide of