Folks buy new headphones for their phone all the time. Just get the right one. Headphones with wires fail all the time, so wireless is arguable better for most folks most of the time. The arguments about sound failures are cherry-picked to ignore that. Also phones are compromised by every hole in the case (water, dirt, static etc). So now there will be fewer catastrophic failures. And now you can walk with your phone…
Citation needed. Have you actually used Bluetooth headsets? Unless the phone has unimpeded LOS to the headset, expect the sound to drop samples, or introduce static, or otherwise be shitty and horrible.
Have your phone in a pocket on the other side of your body from where your headphones' antenna is? Enjoy shit audio.
Did someone turn on a microwave in the same area code? Enjoy shit audio.
Did you run by a new Wi-Fi network? You get the idea.