I came into this comment section wanting to make the same argument, but I guess, you could also be carrying around a USB-C-to-audio-jack adapter in addition to your wired headphones...
Yes, and then the same power management issue comes up because you used to have two discrete poets for their own tasks and you don't. You also have things to lose and to stress the usbc jack so that it fails earlier. 3.5mm Jack is also an especially sturdy jack compared to things like micro USB of the past.
I guess to continue the fire extinguisher analogy, your extinguisher is also your respirator now.... So if you want to use it during a fire, you can't do both. Burn in a fire with your mask on safely OR inhale in all those chemicals and smoke while fighting the fire - PROGRESS!!!