The problem is that the user experience of Bluetooth is absolutely terrible. Every BT device I've used is plagued by frequent disconnects, and it's somewhere between hard and impossible to use a single BT device with multiple other devices (e.g. headphones with both phone and laptop). I own and regularly use a number of BT devices, but I use them because the benefits of being wireless outweigh the considerable frustration of using Bluetooth.
If there were a good, long-lasting (battery-wise), decent sounding pair of headphones, I'd gladly jump on board.
The dichotomy isn't "wireless" or "long cable to some stationary box", it's "wireless" or "in-ear to music player in your pocket".
For me, it's simply easier to wear them while on a motorcycle, since otherwise I have to thread the wire under my clothes, which can be a real mess in the winter layers. It's positively infuriating to have a wire get caught and tug an earbud while fully suited up with a helmet on while on a highway in the winter.
[1] https://9to5mac.com/2016/07/28/npd-wireless-headphones-sales...