That user didn’t “miss the point” and you’ve only reiterated their point that by your logic a piece of paper and pencil is “Turing complete”
A piece of paper is not Turing Complete because the computation happens in the head of whoever is holding the pen.
An excel sheet (or actually a power point presentation!) is, because the user just has to mindlessly, unconditionally, do a simple, non computational action to make the cycles go forward.
There is a difference between the two scenario, and if you can't see it, please do ask questions until I'm able to make that clear to you.
You don't have to turn this into a philosophical problem that will inevitably pitch hypothetical GAI against menial workers, thousand monkeys on a typewriter, or equivalently a young person and billions of neurons on blank canvas. That's not anymore about the technical point of the submission. It would need back up from psychology to remain remotely technical: why did the chicken cross the road?