No, that's not odd. That's you using equipment that you've already bought to make a finished product.
Which has nothing to do with CDs and pirating music. What you're talking about is ripping CDs and burning new ones with songs you've compiled from CDs around the house. Nothing wrong there--you've bought the CDs. Problem is, if seeing the shiny new device at the store is like seeing a new CD you need, then chances are you don't have the songs on that CD already, unless, of course, you download them illegally. Either way, that's one of the oddest comparisons I've seen in a long time.