From a hackers perspective I guess it makes sense yes, and as we are on HN this is perhaps not surprising.
Still, this is not how humans usually interact. I trust there is no poison in my food without analysing it, I trust people to no shot me as I walk in the street, I trust the shopkeeper to accept that I have paid if the card reader says so… As ethno points out [1], some social work is needed here for our collective trust no to be misguided. Crucially, if the social work to buy trust does no exist, it entirely falls on you.
I consider myself that trusting the Echo (or other home assistance devices) is too much work for the meager benefit it provides.