This is the least compelling argument Bernstein makes in the whole post, because it's simply not the job of the NIST PQC program to design or recommend hybrid classical/PQC schemes. Is it fucky and weird if NSA later decides to recommend against people using hybrid key establishment? Yes. Nobody should listen to NSA about that, or anything else. But NIST ran a PQC KEM and signature contest, not a secure transport standardization. Sir, this is a Wendy's.