They should instead focus on their overall software stability and usability. And introduce more physical buttons for climate control. I don't want to click 4 times on a screen while driving in order to enable seat heating.
Oh lovely, now my kids can fuck with my seat, assuming the computer can hear one of them over the other one talking about something else. This is a regression in usability compared to luxury cars from 30 years ago.
This doesn't seem like that big of a problem to me. Yeah, your kids are going to be amused when they find out they can turn on the heated seat. Then you tell them not to do that. If they still do it, then you hand out punishments as appropriate. The kids will decide that the amusement of messing with your heated seat isn't worth the consequences and you go on with life.
I don't use voice so I couldn't be sure, but in the video, the instructor pushes a button to activate Voice. So that may vary depending on the specific year and model.