Now you know

The main flaw is the sample size of all intelligent species known to us: one. It's based on the assumption that every alien species will behave towards a lesser developed one like we did throughout history to ourselves.

I am reading a book called backyard spaceship. Great book. The aliens and people in space have an agreement to not interfere with planets and species that have not mastered space travel. So maybe it's a huge group of people and creatures out there but have agreed not to come see us.