so will you be happy if I overwrite the original file with zeroes 7 times?

Yes, a gift implies that you lose the instance you owned. I see that as a problem. But what if it were solved? If someone could duplicate your meal, or your master paintings, or any good you own, how could you deny her without being immoral? How would you justify exclusivity?

It happens we do have a True Duplicator: the internet. It only works on digital goods, but it already matters a lot. The lack of exclusivity makes anyone lucky enough to be connected wealthier, at very little cost. Again, how can we justify the exclusivity?

My conclusion is that the illegality of the copies only proves the immorality of the law. We ought to find better solutions.