We demonstrate unconventional photon blockade in a symmetric Kerr dimer driven with equal-amplitude fields at a 90^∘ phase difference. The minimum inter-cavity coupling is Jₘᵢₙ = γ/4 at a Kerr nonlinearity U ≪ γ achievable in standard photonic molecules. The quadrature-driven site emits strongly antibunched light with a smooth, oscillation-free second-order correlator directly resolvable with standard detectors. The scheme operates under continuous-wave and pulsed excitation, and fabrication disorder can be fully compensated by re-tuning the drive phase and amplitude ratio, removing the need for post-fabrication cavity trimming