jreelawg said:
Yeah, but humans have been at this space travel thing for a relatively very short time.
You could imagine after 200 years of technological advancement, or how about 100,000 years of further advancement, or even maybe 1,000,000 more years, heck why not make it a cool billion?
Imagine us in 200 years... that's a very good question. I don't know what the next 200 years holds, but it would seem that climate change will play a role (man made or not, forget the origin). I can image a century or two in which the generation of energy, and its storage plays an enormous role in how we proceed, along with other issues such as population control.
IN 100,000 years... well, that's a very long time. Here's a question: what are the chances that a serious impact event or VEI7 or VEI8 will take care of the human issue by then, or that in the search for ever greater sources of energy we don't avoid the tragedies that might have been with atomic research? A million years, and you've DEFINITELY been hit by major impact events, gone through ice-ages and tropical periods, and experienced serious vulcanism. A billion... isn't worth considering.
Your counterpoint could be that in 100,000 years we could protect our planet, manage climate, and ease volcanoes without eruptions. Maybe so, but the history of life, and humans included is not some perfect linear increase in population and technology. I would bet on the human race being extinct loooooong before we're "buzzing" exoplanets, never mind ones we've determined are inhabited by a technologically advanced civilization. Your argument at best, cancels itself out, and at worst it argues for our extinction.
You can't make an argument for alien curiosity and capability by adding orders of magnitude to the time they've been around, because time and uncertainty go hand in hand. What reason does a civilization that has achieved control of their planet, defeated disease and social problems, impact events, vulcanism, etc...
and colonized anything nearby want to do with distant stars? These same creatures need to be advanced, but undetectable by us, have an interest in hiding from us (but not enough to remain out of range of hillbillies, fighter pilots, and whole cities) and seem to take and offer nothing?
I don't need to speculate about time; that is a strange way of behaving unless you posit FTL travel of the sci-fi type, and then we're no longer talking about the same universe. Why travel for hundreds or thousands of years... possibly in a generational fashion... just to do what ETs supposedly have done? What, literally, on Earth can we offer to satisfy curiosity or a need that these aliens couldn't take, bargain for, or move on?