Bathroom

Noone's telling you to give up a fight that can be won. But you have to remember the age old fable about mice belling the cat. Noone even attempted to bell the cat since they very well know it's the bitter truth that they would not win. 

Just think about Nepal trying to gain the Greater Nepal back from India. Noone even bothers because there is no chance that is going to happen. That does not make them foolish. It just shows that they are making reasonable decisions about what is attainable goal and what is not. 

Some goals are simply not attainable and if you are smart you will know what it is. Otherwise you will die trying. 

All the examples you have given were examples where the goals were attainable and it was attained.