Yes, just like you can't eat trucks, roads, grocery stores, tractors, combines, crop dusters, grain silos, mills, or the FDA. Any system needs many components, most of which aren't directly consumed by someone.
My comment conveyed the meaning that you aren't adequately interpreting the point of GP.
To ask "What point?" Is disingenuous, since the point was laid out pretty clearly in the lineage of comments you were responding to.
I don't/can't know why you are struggling to grasp the point. It may be because you don't want to, or it may be because you are missing some other knowledge or perspective - the only way to sus that out is for you to engage with genuine curiosity. That's outside my control. I can confirm as an external party that you are missing the point of the GP, but I can't force you to want to understand it.
You bothered to write 3 paragraphs close to the original comment length 100% being a personal attack, and failed to articulate the point in context of my comment, let alone explain how the original comment answers the eat bit.
I pointed out the question you asked seemed disingenuous and how it appeared you weren't being intellectually curious (which is the point of HN). If you treat every criticism as a personal attack then you're likely to stagnate in terms of your growth.
Here is the point from the comment you responded to, copy and pasted for your convenience. Please prove to me that spoon feeding you makes a difference:
> You could make an argument that agriculture is different because we need agricultural products to live. But we don't need those specific products to live (alfalfa, almonds, etc), and they could be grown far more efficiently if water were priced by market rates.
You can't eat data.