[AlexanderHowl]

Why? The assumption of Homeline is that parallels diverge from Homeline, not from our Earth. In fact, there could be Infinity agents working on our Earth to prevent us from developing parachronic technology (since we are too divergent by now to be an echo). Perhaps the Men in Black are Infinity agents and some of the people who disappear each year are actually sent to Coventry because they got too close to developing parachronic technology.