The difference is that the instance of the chair cost Wal-Mart money.
Imagine if you had a machine that could reproduce something from a photograph of it. You could then go to a shop and take a photo of a chair, and reproduce yourself a chair from it. But the shop wouldn't take an actual loss in that case.
There's nothing gray about that difference. If you steal a chair, the value of their inventory decreases by one chair, and if you merely reproduce one from a photo, it remains the same.
Nor do we need to make up a new word for the behavior. The English word is "copying." It's centuries old at least, and the behavior, in the case of manuscripts, goes back millennia.
So I'm not proposing we use a new word to make everyone feel better. I'm proposing we continue to use the existing word, instead of the one the music industry is trying to get us to switch to to make everyone feel worse.