One reason a lot of people talk about balance is they don't like it when players always choose the same abilities or tactics. But if you think about it, in stories characters do this all the time!!
I'll just use Inuyasha for example. That boy is using Wind Scar and Iron Reaver Soul Stealer (I couldn't spell the Japanese words sorry
all the time, day in and day out. Superman? Superpunches, eye beams, fly into bad guys. Unless he's forced to do something else, you don't see Superman going: "Hmm....maybe I should try to trip this guy!!"
I'll just use Inuyasha for example. That boy is using Wind Scar and Iron Reaver Soul Stealer (I couldn't spell the Japanese words sorry