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 in your pants pocket or purse (or anywhere), without a wire dangling!

{edit: explain}