My read is that some rocket manufacturer is trying to drum up business for his company. Besides, nukes are so 20th century.
They’re also of dubious use against stateless terrorists who use suicide runs as their FIRST tactic and think they go to a heaven full of f*ck toys if they die in battle. MAD doesn’t work that well against a horde of illiterate savages who think they win if one of them survives on the whole planet and all of you die.