Faulty excuse - like everyone has said, when you have a SPOF you have a problem. As for openreach, it's not totally their fault. Take my sub-exchange for instance, it serves 500 houses. That's not many, but most of them are close enough to connect directly to it. There isn't space for the roadside furniture to sit. So what often happens is that openreach cable up the exchange and then find themselves in the predicament of not having a cabinet to fibre up. It would be prohibitive to fibre to the premises so they need another solution.