Practical for some scenarios, but impractical in others. A headphone jack also offers better sound quality overall and a less flaky connection, with no audio cutouts. It's not just latency, it's a superior and more reliable way to transmit high quality audio. And there's no battery to worry about charging. And a standard set of wired headphones can last for DECADES while a Bluetooth headset will start to die in about five years or less because the battery is non-replaceable lithium-ion. And there's no concern about whether your wired headphones are optimized for Android or iPhone, it's a standardized connector with an identical experience on both. And there's no issue with wireless interference on the 2.4GHz band that Bluetooth operates on.

I can come up with more if you want.