No, a contract is not simply a contract. Contracts are only enforced when a court agrees they are enforceable. A court can declare a contract unenforceable for a variety of reasons, such as if it was ill-formed, one side was overwhelmingly more powerful, or the contract is against public policy (such as non-compete agreements in California).
And in this case, Lyft is simply trying to ascertain that the courts will uphold this contract. No need to hate on them simply for taking the city to court.
https://www.nolo.com/legal-encyclopedia/unenforceable-contra...