It's a very difficult question.
I'll go back to the original point you made, which was about deliberation. We need to find a process to do this that is more deliberative. Polling doesn't generally do it, because you're asking a question that people often don't understand or in which the question wording shapes the answers. The citizens' assembly was a mechanism for creating a deliberative body that could discuss this and had some legitimacy, even though it wasn't an elected body, in what it represented because it was a microcosm of the larger electorate.