The fact that the Emperor gifted the sword for display near the ancestral temple was one thing, but Zhao Changhe couldn't fathom why he kept his own Divine Sword hidden as well. Weapons were meant to be used, not enshrined as offerings to ancestors... What would you do when it was too late to utilize them during critical moments?
However, once the world reached a higher level, it undoubtedly became fantastical, and some situations may not be comprehensible at his current understanding. Besides, whatever the circumstances might be, it was not Zhao Changhe's place as a "guest" to interfere, so he didn't pay much attention and followed Cui Yuanyang into the Sword Collection Room.