I pointed out they were providing ridiculous answers to the question of "how do you measure value" and they doubled down on the ridiculous.
You are correct, there are many ways to measure value.
However, I don't think picking various commodities as the "true" measure of what is "valuable" is a useful exercise.
You may disagree. That's fine! I suggest you put your wisdom to use on the various markets that are set up for this purpose instead of arguing with me.
EDIT: they ultimately never reached my main point anyway, which is: regardless of if you measure value in tons of steel or crushed coconut shells, if China could easily obtain that value by assembling this stuff themselves, why export all the inputs to us instead?