> I have a pair of bluetooth headphones I use for the gym and I love them.
Yeah, that's why you don't see it as a problem. The majority of people still use corded headphones, some of which are high-quality, pricey investments that you don't just want to stop using. If you end up misplacing that little dongle, you can't listen to music privately until it's replaced. Seems like a downgrade in functionality, with almost no improvement, considering you are already using your bluetooth headphones effectively.