I don’t agree that the blame here rests on GMs “letting their players rest”. It’s a more fundamental issue with campaign styles not meshing with the way the system is designed. (Or more to the point: the system not being designed to be optimal for the style of campaign that the majority of the audience wants to play.) “Don’t let them rest…give them one more battle” is not advice that works well very often in a strongly narratively-driven game where GMs generally avoid excessive random encounters.