Not even from a safety perspective, but from a UX ergonomics perspective:

Give me a D pad, an OK and a Cancel button. And make a phone API that works exclusively by that and the sounds and chimes it outputs.

I just want every supported app to be in a top level list that I arrow through and OK. Then within any app the options are all navigable in simple ways. Overall functionality is reduced.

Voice control is a secondary system altogether.