"Hanging out with your friends... That's really important to me, too. Friends are your power, right?"

Sora has no idea what Roxas meant when he said "collect hearts," but he'd mentioned previously that he releases hearts from the Heartless. Nothing wrong with that! Whatever this Organization is, they must be a band of heroes helping out with the Heartless problem or something. Sora could respect that. Heck, he was even thankful for it.