The issue has nothing to do with bitrate. The first issue is that the signal cuts out randomly due to interference. The second is that you have to convert the signal to analog and DAC quality matters.
To increase battery life, you have to go with more simplistic conversion which reduces quality. To reduce the cost of 2 DACs (one per ear) you have to use worse hardware. The net result is that the onboard DAC is basically guaranteed to be better and the amount of interference over wired headphones will be minimal.
To increase battery life, you have to go with more simplistic conversion which reduces quality. To reduce the cost of 2 DACs (one per ear) you have to use worse hardware. The net result is that the onboard DAC is basically guaranteed to be better and the amount of interference over wired headphones will be minimal.