on a reasoning it isnt due to their genes or blood or tribe but in type of area they live, which makes them tough, agressive.
bring them plains of punjab or sindh for a century and you would see how different they become.
as for conquest, you can conquer the lands easily but not ranges of mountains.
tired of these kinds of self glorification as if they are born to fight only they have already lost too much culturally in afghan war and now in this talibans fascism.