I disagree. Having wireless headphones is a lot more convenient and wired headphones for some use cases, such as exercising, where the cord tends to get tangled

I disagree. Having wireless headphones is a lot more convenient and wired headphones for some use cases, such as exercising, where the cord tends to get tangled up with either you or the exercise equipment you're using. More generally, not having to plug things in is obviously more convenient than having to plug them in, all other things being equal. 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.