I agree that age may have played a roll in this as far as explaining it in the Star Wars Universe. However, you also have to take in account that Lucas, when making Episode IV, did not intend for there to be any sequels. He probably didn't want to focus so much on the saber dueling, which ironically has become one of the most loved features of the Star Wars saga.
I don't need you no more in this world. I'll meet you in the next one, and don't be late.