We'd like GDP to track what we would consider value, but it need not. It's not hard to find people who will complain that some contribution to GDP is unhelpful,

We'd like GDP to track what we would consider value, but it need not. It's not hard to find people who will complain that some contribution to GDP is unhelpful, detrimental. It wouldn't be hard to find sour words speaking out against financialization, for example. Economic rents in general can contribute to GDP but intuitively are not 'real value' because otherwise we wouldn't call it rent. Governments can create a lot of worthless work that contributes GDP, but unsustainably. It would be debasing to the word 'value' or 'productivity' to ignore that. We'd like at least for 'real value' or 'productivity' as intuitively understood to contribute to GDP. That is, from an increase in value one may infer an increase in GDP (usually). I can accept that. I take issue with an inference in the other direction. If I knew how much 'real value' contributed to GDP and how much was in excess of that contribution, I would be an incredibly accomplished economist.