Tech-literate people have a better understanding of what could go wrong. And that's even if they trust the creators: those of us who write code know how inevitable bugs are.
These devices are also black boxes. Your laptop, if you're technically literate, is largely an open book as far as what it's up to, should you care to investigate. Granted, your phone less so, but it's also pretty easy to corral if you want to. The entire point of the always-listening assistant is that it's always on, listening. It would be awfully silly to buy one and then unplug it whenever you're not actively talking to it.
These devices are also black boxes. Your laptop, if you're technically literate, is largely an open book as far as what it's up to, should you care to investigate. Granted, your phone less so, but it's also pretty easy to corral if you want to. The entire point of the always-listening assistant is that it's always on, listening. It would be awfully silly to buy one and then unplug it whenever you're not actively talking to it.