Incorrect sir, if one does not care at all about the topic then it isn't a swing and a miss, but more like pitching a ball. Using "could not care less" would be a logical error as they are not potential customers to begin with at all which is what he is addressing. Not those who do not care at all, but those potential customers that don't care enough to purchase the product.
If you hadn't noticed, this is Forum 2.0