When you press it, music pauses/dims, so loud music isn't going to get in the way of you being heard. Kids can't just yell "car, do X" because they can't hit the button on the steering wheel.
There are valid reasons to dislike voice-controls, but the ones you've picked are not issues with the specific system in question.
Similarly in many cases with windshield wipers, headlights, windows, temperature controls, etc.
Drive by wire systems are simply not completely mechanical anymore, but you don't have to ask them to do something for you, they translate a mechanical input into an electric signal and then in a mechanical output.
There is no understanding involved.
I hope you realize that.
Th gas pedal is still a moderately precise mechanical actuator that can be easily and accurately measured regardless of who uses it, you can also use a stick or a brick to accelerate, the car doesn't care as long as you move the pedal.
You can also be a mute and use it.
big difference uh?
I shouldn't say to my car what I want the car to do, I should do it.
Also, I listen to loud music when I drive.
Imagine you are driving and the kids start activating car functions because it's fun.
Thanks but no thanks.