I just took a look at the Pulitzer Prize winners for investigative reporting[0] and I havn't heard of any of them from the last ten years. Didn't look any further.
If anything, corporate "news" spam drowns out these deeply researched investigative stories because, as GP said, the market conditions favor drama farming clickbait over an "exposé of highly toxic hazards inside Florida’s only battery recycling plant" which, while clearly important and deeply researched, I have never heard of.
That said, most of these journalists are from "corporate media," so that it "produces nothing of intellectual value" is as you say incorrect.