Jacob Haggarty said:
You are assuming of course that it is they who reach us.
Yes. That's a safe assumption. Because we're a
long way off interstellar travel.
No one has ever stated that if extra terrestrial life exists it must be advanced. All they say (and accurately so) is that if they made it here. They're more advanced that we are. There are plenty of fictions about aliens less technologically advanced than we are. Look at 'Alien' For god's sake.
So you essentially just brought up a completely moot argument.
And as flawed as humans are, we arent THAT bad. People again seem to think that we as humans are programed to kill on sight, which simply isnt true. OK as humans we've done bad stuff to each other, but we dont constantly set out to inflict pain or misery on one and other. Have a bit of faith.
And if we found a planet (sometime in the future) full of less developed lifeforms. We wouldn't just pop down to say 'Hiya'. We'd be looking at how we could exploit them. And if we considered them a threat. We'd kill them. This isn't some self deprecating twadle. Just look at how we treat each other. We are ruled by fear and anxiety. It's just good sense if you want to stay alive really.
Also, judging our behaviour is by no means an accurate measure of another lifeforms. What i think you mean is its the easiest to relate to.
Finally I'd like to draw you back to this
We're anything but altruistic and while that doesn't mean that's true for all possible intelligent life. It is a good estimate.
At-least read what I say.