There is no oversimplifying happening here. There is no documented procedure to switch to direct law in an Airbus. In fact, the only way to get into direct law

There is no oversimplifying happening here. There is no documented procedure to switch to direct law in an Airbus. In fact, the only way to get into direct law on a fully functional plane is to start pulling circuit breakers for the (redundant) flight computers and inertial reference units.