Local non-utility does not imply global non-value. Of course there's costs and benefits, but it's hard to have a conversation with good-faith comparison using "many see it as overly complex" -- this is an analysis that completely ignores problem-fit, which you then want to generalize onto all usage.

People can still draw generalizations about a piece of technology that hold true regardless context or problem fit

One of those conclusions is that GraphQL is more complex than REST without commensurate ROI