I wish there was a "cast" (eg chromecast) style setup that could just connect to my headphones over wifi. Why cant I just stream music to my headphones and have

I wish there was a "cast" (eg chromecast) style setup that could just connect to my headphones over wifi. Why cant I just stream music to my headphones and have the Mbps of throughput and range of my wifi? Similar to how I can with video to my TV