Sound Quality. Why ignore the most fundamental benefit of any kind of headphones? Rhetorical. Bluetooth still doesn't compete with the sound quality of wired headphones. Thus, that MUST be ignored to try to rationalize the bluetooth argument. Even Apple doesn't completely buy "bluetooth is better." Else, why include a Lightning to 3.5mm adapter in the box? And why build the "obsolete" jack into the brand new(er) MBpros? And why- per rumors- keep it in next year's iPads?
But if we want to get into secondary benefits and just ignore the most important one, how about latency, ubiquity, no need for batteries or the hassles in charging them at all, maximum audio bandwidth, don't fly out of our ears, less likely to get lost, lower lifetimes before they fail, etc.
"Better battery life" is missing the point. In fact, my particular wired headphones have a battery in them that outlasts any set of Bluetooth batteries. So if it's all about "better battery life," apparently I have the best headphones in the world.