Given all the disinformation out there, the potential risks to our cultures if visiting extraterrestrials were revealed, what would happen if extraterrestrial technologies were reverse engineered, what that may mean from a religious perspective, so on and so forth, it is a real-life "Pandora's Box" of unknowns.
My guess is that we are finally making some attempt at opening up that box very slowly. Introduce the conversation into the mainstream, spoon feed us some information a bit at a time, and slowly gain some acceptance that we are not alone in this great universe, that we may actually be a part of a much larger community. It's not a matter of IF extraterrestrials will reveal themselves, it's a matter of WHEN, and we had better be prepared, as a world, to accept them instead of having this knee-jerk response of fear and violence.
Furthermore, I think we need to get away from these limiting ideas of "propulsion" as a means of traveling. In order to travel great distances in short periods of time, given the vastness of the universe, you can't do this even at the speed of light. It has to be orders of magnitude quicker. So, it's not traveling via propulsion. Space travelers, in order to visit many worlds, considering radiation exposure, and physiologic effects, must be able to transport themselves from point A to point B something in the realm of seconds. It's a level and understanding of physics that is well beyond us at this stage.