This touches on the heart of it. AI generates bullshit. By definition. Bullshit is something that is produced without any care for whether it is true or authentic. The bullshitter's only concern is its value to the bullshitter. AI has no notion of truth or honesty. It's all just prompted, predictive streams of output. When we recognize it, we have the same reaction as we do to human-produced bullshit. Maybe even a little worse, because human bullshit at least may have some evidence of humanity in it. AI bullshit doesn't even have that.
But soulless corporate bullshit was the same before "AI". It doesn't matter how it was produced, it's just that "AI" does it faster and cheaper.
So it doesn't have to be machine generated, just looking like it is is enough.