Do ambulance crews stop giving cpr and sit strapped in when the vehicle is in motion because some rule in the Highway Code says all occupants of moving vehicles must do so?
SOPs become a curse when people lose the ability to apply common sense to a situation. If someone dies because you sat down for landing where's your conscience for the rest of your life, and how would/could the event be depicted to grieving relatives?
The ANO is, or at least used to be prefaced with what we called the life and death clause. "Nothing in these regulations shall prevent a person from carryng out whatever actions they see fit in the course of preserving life" or words to that effect.
It shocks me that this question even needs to be asked.