Also, when transcription programs (most familiar example: YouTube) fail, they usually fail on the words that a human listener would also have trouble understand

Also, when transcription programs (most familiar example: YouTube) fail, they usually fail on the words that a human listener would also have trouble understanding / telling apart. So the transcription is useful if you are deaf or forced to watch the video without sound, but if you're using subtitles because your English is not good enough to understand the speakers without them, their usefulness is pretty limited...