I agreed with you in the first half, that we won't ever make it to "sci fi space defense", but not because humans don't persist. More likely we never make it t

I agreed with you in the first half, that we won't ever make it to "sci fi space defense", but not because humans don't persist. More likely we never make it there because of a host of other, more boring reasons, mostly; we won't need anything like it. Who, exactly are we defending ourselves against? A once-in-a-million-years impact that this very test showed we have a conceptual means of resolving?