Heard at a magic club meeting: "I don't care if I fool them, as long as I entertain them." Really? I submit that if you're not fooling them you're not doing magic. You may be juggling, or doing comedy, or doing drama, or some other performance art, but you're not doing magic. Nothing wrong with this unless you're billing yourself as a magician. If you want to be a magician you'd better care if you fool them, sparky. That's not all you need to do by any means, and in fact it's just a starting point. But if you want to be a magician it's an essential starting point. I can only imagine my mechanic saying, "I didn't fix the car, but I got it clean!"
The problem is easy to spot. In fact, it was defined in the first three words of the offending statement: "I don't care..."