The article itself mostly just urges behavioral economists to do better, which is always good advice for everyone. But as usual, it’s the inflammatory title that’s gone viral. I think a strong interpretation of behavioral economics as dead or debunked is unjustified.
Scott Alexander has written an in-depth article about Hreha’s article:
See also Alex Imas’s and Chris Blattman’s criticisms of Hreha (on Twitter).