I just asked a non-tech person behind me if they thought that when you asked Google Assistant a question it was sent to Google to answer, and they shrugged and said yes like it was a stupid question.
What ordinary person doesn't understand that when you asked Google a question that Google knows the question you asked? It doesn't make sense.
They don't need to understand "computer memory or how computation works" to grasp that the person/entity you ask a question to, has to know that question in order to provide an answer. In fact you could have never used a computer and grasp that concept.
You're trying to make this more complex to mask the fact it is a logically flawed premise.
Better questions:
"Do you understand that when you ask Google Assistant a question, a human might listen to it and not just an AI?"
"Do you understand that the human might not be a direct employee sitting in a Google office -- that they might work for 3rd-pary company that Google just contracts out to?"