My objection to the idea is founded on a basic law of physics, namely the finite speed of light. Given the unimaginable distances between even remotely life supporting environments it is far more likely that we would detect the photons of intelligent civilizations (electromagnetic energy) long before we would encounter their mass. The amount of time and energy needed by massive beings to venture into space without having any clear return on investment would strongly suggest that any really intelligent civilization would rule it out.
Since we have not yet detected any electromagnetic indication of intelligence I would put the probability of encountering them in the flesh so low that if you squared it it would equal zero.
Dude, they’re already here & they’re the majority in Congress.
However, there may be supercedent that allows one to go faster than light, without violating the laws of physics. We just aren’t yet aware of those laws.
Just like, before the Wright brothers,it used to be thought that heavier than air bodycraft was an impossibility for man. However,the Wright brothers figured out how to supercede the existing known laws of physics and we now have planes.