Technological feasibility is not economic feasibility. We spend a minuscule amount of our resource budget on science without short term profit . There are orde

Technological feasibility is not economic feasibility. We spend a minuscule amount of our resource budget on science without short term profit . There are orders of magnitude of things we can achieve as a species with current technology if we all work together efficiently but we don’t . We ascribe to aliens a singular purpose that we have never achieved in our history as a species. Our competitive, acrimonious past is fundamental to our scientific progress (we research more during war than peace) . A peaceful civilization may not reach technologically maturity. It could also be just that Interstellar travel is not simply be economically viable in time frames that those civilizations optimize for. Ours can barely look beyond a quarter, why do we think any other civilization would plan for hundreds if not thousands of years .