i think you may be right, that technology though so advanced cannot penetrate the outer reaches of space, or so far out where other life forms might exist. When you look at Mars, the Moon, or anything remotely reachable by man, there isn't any kind of life, not the sort that has evolved over billions of years on earth. That feeling of complete aloneness, that no one will exist after earth disappears, billions of years from now, is quite extraordinary, even provided man survives that long, going on our propensity for war..
life is mysterious, it does throw up questions and very few answers, why are we here, do we have any purpose, or just filling the space. Endlessly fascinating...