An aggressive species will never reach the stars. It will waste all it's resources in internal wars. However, a peaceful species will never have anything to do with us.
An agressive species will never reach interstellar space. They will waste all their resources in internal wars. At worst they will be as the Vulcans of Star Trek.
If mankind had used all resources spent on wars on science we would be out there already.
I once tried to see if I could get the "support guy" annoyed to the point of him having a stroke. I failed as he only got slightly confused. I have not got any such calls after that, perhaps the blacklisted me. And no, him being poor does not give him right to scam others.
Intelligent life would require a better brain than ours, most likely some areas bigger than ours. That would require bigger bodies and higher energy consumption. This would be a disadvantage for survival if food supply at any time were diminished. My guess is no intelligent life exists anywhere. Definitely not on this planet.