I can see how you interpret postmodernism that way. I don't disagree with it. But I observe a practical ceiling on most postmodern thought because our postmodern institutions, such as liberal colleges, don't bring people to that construct-aware level. Most people either end up in a pseudo-nihilism or falling back to concrete beliefs.
I'm not defending David's writing as being overly original-most of it is old Buddhist thought. I do, however, think it's important that people today be thinking, writing, and discussing these topics. Many of the worlds problems are related to cognitive development and a lot of us are left floundering when we run into the limits of our institutional education.
Someone above linked a writing he had about pomo that I almost completely agree with, the main problem with it being that understanding it pre-rationally leads to nihilism. That does not, however, mean that pomo is nihilistic, only that incomplete interpretations of it are.
Postmodernism as a canon is almost too powerful for its own good, which is ironic in that each of the individual writers almost aspire to powerlessness in their desire to eliminate modernist structures of domination. There have been a few times in my life where I could literally feel my perspective on the world shifting to a higher mode in an instant, the first was with Sartre, and the most recent was with Foucault. Approaching it at the right time and with the right teachers can fucking change your world, but the process to get there is heavily individualized and I fear perhaps can't be standardized. If you don't arrive willing to accept the ideas as divers furtherances on your own conceptualizations, you will reject it as nihilism.
I'm not defending David's writing as being overly original-most of it is old Buddhist thought. I do, however, think it's important that people today be thinking, writing, and discussing these topics. Many of the worlds problems are related to cognitive development and a lot of us are left floundering when we run into the limits of our institutional education.