Why does Goldstein say that although the superpowers talk about total victory no power believes it is possiable or even desirable?

Goldstein argues that while superpowers publicly proclaim the goal of total victory, they privately recognize that such an outcome is neither achievable nor desirable. The reality of mutually assured destruction from nuclear capabilities creates a paradox where complete domination would lead to catastrophic consequences for all parties involved. Consequently, maintaining a balance of power becomes more practical, as it allows for ongoing competition without risking total annihilation. This understanding fosters a state of perpetual conflict rather than a clear resolution.