Sure, aliens are certainly a more mathematically likely explanation than us arriving here by accident.
But does that make them the answer?
yes, take me to your leader!
Yep. Aliens. Due to advances in the information sciences, the question arises: Where did all of this genetic information come from? Instead of the road, should we be asking why the chicken crossed the universe?
Information does not arise spontaneously from matter. Scientifically observable evolution points to mutation and a loss of information as the mechanisms of variation.
So, where did original life and all its enriched variants come from? Was it an accident? Mathematically improbable. God? Possibly. Aliens? Scientists have started to consider panspermia as a method for starting or markedly re-directing life here on earth.