Prohibition is a non-sequitur analogy. You're not going to get arrested for mere possession of general digital music/videos/books regardless of how acquired.
Yes, a potential customer is talking. He's justifying illegal activity: "if you won't consent to my terms, I'll just take your stuff anyway" - this is not a persuasive argument. I'll justify legal activity: "if you won't consent to my terms, I'll get comparable stuff elsewhere from someone who will" and proceed to get movies via Netflix and music via iTunes with acceptably, if imperfectly, cheap & convenient terms - this is a persuasive argument.
Yes, a potential customer is talking. He's justifying illegal activity: "if you won't consent to my terms, I'll just take your stuff anyway" - this is not a persuasive argument. I'll justify legal activity: "if you won't consent to my terms, I'll get comparable stuff elsewhere from someone who will" and proceed to get movies via Netflix and music via iTunes with acceptably, if imperfectly, cheap & convenient terms - this is a persuasive argument.