Obviously a design defect , they should be limited to listening to the normal range of human voice ,, or even a reduced range like the phone system. You’d think they’d use a cheap microphone that can’t go above 3.5khz.
But think about this - these same devices are being used to record HD or even UHD video - I'm sure folks recording such would want super-low fidelity audio to go with the high-quality visual....