Earlier quoted context omitted.
All of the assumptions (and the metaphor) contained in that response of yours seems to contradict the statement itself. By using “just” you’ve already asserted that there is nothing more of relative importance to figure out—it’s done, figured out.
Yes, by using "just," it is a thought terminating word. However, again, I do believe we have it figured out, based on how we understand the rest of the universe to be physically-based as well. It is, in my experience, human arrogance that leads us to believe that we are somehow more than physical structures. It makes people feel uneasy to believe that so they invent something to solve that cognitive dissonance.
Contrast that with the arrogance of creating a neural network in your garage and thinking to yourself: “well I guess as a side-effect of this all of existence makes sense now.”