It's also a philosophy which unveils the very structure the marketing gimmicks are built upon.
You can't make it postmodernisms fault that our philosophical inquire made us realize what the postmodernists realized. It might be horror in your eyes but then reality is horror and it's our job to build useful structures on top of that knowing they might not last forever.
It's not like postmodernism can be disregarded just because it doesn't lead you to some "Truth", philosophical inquiry leads us wherever it leads us. That's the point of philosophy, not giving you comfort in truth but in inquiry
You can't make it postmodernisms fault that our philosophical inquire made us realize what the postmodernists realized. It might be horror in your eyes but then reality is horror and it's our job to build useful structures on top of that knowing they might not last forever.
It's not like postmodernism can be disregarded just because it doesn't lead you to some "Truth", philosophical inquiry leads us wherever it leads us. That's the point of philosophy, not giving you comfort in truth but in inquiry