I taught this to my wife and two children.
My Father, older brothers and sister all impressed on me that immediately clearing a gun after accepting it from another, even after that person just cleared it, was not a sign of disrespect but one of courtesy and safety.
When I hand over a gun to someone I clear that gun and I then make them clear it if they do not do so immediately upon receipt.
I learned that from the LTC who was in charge of our NG unit’s pistol team. He insisted on every shooter clearing each weapon when they touched it after getting it from another shooter.