Ok maybe not so much lazy but fear of not being able to get the damn thing put back together.  It is an old car with rusty sticky bolts.  I heard it could be a *************** to get the outer shaft out of the hub and then even more so to get it back in. Then while I had it all a part I mite as well change the brakes and bearings.  Just trying to save my self a little time, money, and hart ache.  
  
And who wouldn't take the easier faster way if the end results were the same?