As I already said, the cable is removable. If I want to use them with a usb-c device, I can exchange the cable for one with a usb-c plug and if I want to use them with a standard headphone jack, I can get one with that. It’s a bog standard pair of cans with removable cable. I can even get cables with in line microphones or short cables or extra long cables or with entirely different connectors. It’s just a 5€ cable. Also, when I bought the cable, the connector wasn’t yet obsolete. Lightning has been around for quite a while.
And sure, it’s not as good as just having a headphone jack, but as I don’t have one on my phone, that’s the next best thing, if I want a wired connection.