Given the large territory of both KSA and areas controlled by Houthis, it will be difficult to stop every BM or drone to intercept by KSA even with combine AD from Pakistan-Turkiye, I mean just look at the Iran situation, despite America/Israel bombing the holy hell out of Iran, Iran still manage to launch few drones in response. Its impossible to track and takeout every 2-3 people team which can track and hide in mountains with few drones with them and launch towards the target, Terrain plays a big role and its one of the reason why Iran survives, Houthis surviving and so are TTP/BLA...