"they're groundbreaking devices in the development of what used to be called"
Are they? Even among humans, voice commands can be utterly inadequate and cause misunderstandings or confusion - that's why different ways of communication - using written words and drawings, have been developed through the centuries to convey more precise meanings. Or were forced to use a simplified set of words/phrases with very precise meanings valid in a specific context only.
Voice commands also mean higher latency. People can usually act much faster than they can talk. We also process visual stimuli far quicker. For example, I hate podcasts - I can read much faster. A weather report with a Sun icon and a temperature below it will instantly give you all the info you need in less time than listening to a voice telling"Today will be sunny with a temperature of 26°C"-
That said voice could be *another* input channel that cold help to multitask more - and obviously can be quite useful for impaired people (as long as they can hear and talk...). Still, any usefulness is not an excuse to violate users' privacy.