There’s a fundamental difference between being able to recognize the best option and being able to implement the option. These sorts of rules are really about

There’s a fundamental difference between being able to recognize the best option and being able to implement the option. These sorts of rules are really about people feeling devalued or disliking being volunteered or told what to do (often by people they consider less knowledgable). They aren’t really about effectively distributing work. “Just” gets a bad wrap. There’s a sort of hidden assumption here that “you can just” is equivalent to “you can easily”. It sometimes means that but more generally it means something more like “…will be easiest” which can be true even when the action itself is hard or a lot of work.