Earlier quoted context omitted.
When I rented a Tesla I recall being able to set all these controls with my voice.
How well does voice control handle outside noise? Torrential downpours, sleet/hail? If the windows start to fog during one of those situations, taking your attention off the road to look and swipe is very dangerous. Edit to add: Is the voice processing being handled on board? If not, then if your signal fails....
You do need to speak loudly, and there's an unfamiliar concentration aspect to using a voice command rather than a switch.