S.o.S. It is a fine point. Yes they are 'lawful' commands, however 'strict liability' means that the airline admits liability (regardless to the actions of the injured passenger) to all accidents that happen on board. So the actions, or not, of the passenger are irrelevant when it comes time to compensate the passenger for proven injuries. Yes they did something unlawful, or stupid, but the airline is still liable.
The other side of the coin "capping of financial liability" means that the airlines can secure adequate insurance. If liability was not capped no insurance company would insure an aircraft with more than 1 or 2 passengers.
This also means that the costs of litigation are avoided.
Read your Ts&Cs.