Why is game theory more flexible than standard models of market behavior?

Question

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The Answer is Game theory is a highly flexible tool that can be applied to many situations without making the restrictive assumptions of the supply and demand model or the variants of it, such as monopoly and monopolistic competition. Game theory allows us to develop more precise models of oligopolistic markets and of all situations that involve strategic interaction.
It offers a new set of models that can be better tailored to fit the actual problems economists face, and thus are more flexible than standard models. A different game theory model can be developed for each different situation and for each different set of assumptions. So rather than have a single model with a single equilibrium solution, in game theory there are many models that often have multiple solutions.

Why Is Game Theory More Flexible Than Standard Models of Market