No, a quite true one.
That someone downloaded a copy of your song, it does not mean that he would buy it. Even it does not mean that he will keep it or listen to it.
So if hypothetically I walk into Sears and shoplift a blade for a lawnmower even though I live in the city and don't have a yard, that's not theft? Because, by your logic, since I don't have a yard, my stealing of the mower blade can't possibly be theft and I'm somehow *entitled* to the mower blade without paying for it.
Read the dictionary definition for the word "theft" some time, then get back to me.
Unauthorized downloading is stealing, plain and simple.
A blade has a value certain. That was dumb.
A false analogy. The proper analogy would be if you make a photo of the blade and make a replica in your basement.