All OP has to believe is that Coxon himself believes the hype.
But I don't think that's their argument. I think their argument is that people should make moral choices to avoid employment with AI firms, and if you're using Coxon for that argument, you can't coherently argue that models are hype objects simultaneously. There is no greater claim you can make about AI hypercapability than that it will eradicate humanity.
(I don't buy any of those claims, for what it's worth.)