Based on the fact that there hasn't been any known alien encouter during human written history, that we haven't found any artifact of such an event, even in a distant past, that a 100ly radius is really tiny at the scale of the galaxy, that we haven't found any sign of life outside earth, and that anyway, if an alien civ is advanced enough to come here and invade us we can't really hope to do anything againts that, there is indeed no need to spend time worrying about that.

Considering the evolution of computing and technology in general in the last 50 years would you consider the two things to be remotely comparable?

I personally don't.