Why do think that way? I feel with Siri and Google talk drivers will not have to look at thier phones and have texts read to them by superior voice controls. Now the next step a driver won't have to push a button to invoke Siri and instead just say a phrase to bring up a response.
Considering the point of those systems is to make interactions with the device easier while keeping your eyes on the road and hands on wheel, I don't see the problem.
However, I can have text conversations and make phone calls without ever removing my hands from the wheel and I don't even have Android Auto for my phone.