In Meng Fan's view, if he could successfully obtain the inheritance of the Sword Immortal of Alchemy, then he would truly be the rightful heir of the Sword Immortal.
Taking these Spiritual Swords with him wouldn't be an issue.
But if he couldn't pass the Sword Immortal's test and become his "heir," he naturally wouldn't touch these Spiritual Swords.
Meng Fan couldn't care less about other people's rules; he had his own!