It's easy and cheap to get USB-C to headphone jack adaptors, so anyone who wants to use wired headphones can do so. (The Apple one is $9, and we know how they like to gouge on accessories.) I've also seen simultaneous headphone-and-charging variants for under $10.
Personally, I could never stand using wired headphones with my phone, so I wouldn't want to do it. But the option's there.
Have you ever tried to put a phone with one of those sticking out of it in your trouser pocket? The long USB plug ensures it doesn’t really work unless you fancy breaking your USB-C port.
(Used wired on-ears and IEMs for a while, tried using an adapter for a bit, switched to Bluetooth over-ears recently. Appreciate the convenience, don’t appreciate One More Thing I Must Charge.)
Personally, I could never stand using wired headphones with my phone, so I wouldn't want to do it. But the option's there.