An electric dipole consisting of two point charges, \(+q\) and \(-q\), separated by a distance \(d\) is located at the center of an imaginary spherical Gaussian surface of radius \(R\), where \(R > d\). A student observes that while Gauss's law is mathematically valid for this surface, it cannot be directly used to calculate the electric field magnitude at an arbitrary point on the sphere. Which of the following statements best explains why Gauss's law is valid in this scenario but cannot be used to determine the electric field magnitude?