How is that even relevant? It's not audio vs. text, it's speech vs. typing. Just use speech-to-text, and you can see your text on the screen before you give it to Siri or your friend. Still better than typing.

I think it's pretty valuable. I would rather talk to my phone to send a text message while driving rather than pick it up and cause an accident.

"Ok Google, text Jim Traffic is bad, I'll be late"

While voice commands may be better than using the keyboard, they're still distracting and dangerous. It is best to avoid interacting with your phone at all while you drive.

Sending text messages while driving is extremely dangerous no matter the input method. Hands free is not safe nor safer.