Content—we’re led to believe—is a little like the words making up this sentence you’re now reading. Individually, the words mean very little. Sure, you could look up their definitions if you’re so inclined. You might even already know the meanings. I suspect you do. But individually, words mean little. It’s the context around them—the sentences—that provides their meaning and intent. That’s what we’re led to believe anyway.
What is content?
You’ve gone a lot deeper into this than I could, I think. I call it being trapped inside the bullshit machine.