Whether you’re an evolutionist or a young-earth-creationist or something in between, everyone knows modern humans have only been around for a few thousand years.
If we could achieve the inconceivable accomplishment of light-speed travel, it would take a span equivalent to the entire existence of modern humanity just reach most solar systems in the universe (based on modern scientific estimates of their distances).
Just speeding up and slowing down, under the parameters of our current understanding of physics would take years in order to avoid being ripped apart. And this does not address the energy and mechanical challenges of achieving such speeds.
What are the implications? Even if the Universe did have lots of intelligent life, we can never interact with it using any known technology. Interactions with alien life requires the discovery of faster-than-light travel, aka time-travel.
If time travel is possible, it is far more likely that any “aliens” we encounter would be from earth’s own future rather than some other galaxy.
Time Travel gives Me Gas!