Perhaps because someone suggested I'm sticking my head in the sand like an ostrich about evolution and the origin of life? So do you believe life in the form of a unicell came about around 4 billion years ago?
IMO life didn't come fully formed. There are to many variations/too much diversity of life from very simple to quite complex.
It's took billions of years for life to get to where it is. Life has a goal and life's goal is survival, regardless. People always talk about a god, maybe life is the god. Who knows.
That is why we have had/have such wide diversity. In water, on land, high altitudes, low altitudes, using O2, using CO2, one sex, two sexes, sexual, asexual, unicellular, multicellular, shallow water, deep water, etc. Life survives.
Life, no matter how it started is all about diversity to ensure it(life) goes on no matter where or how, and that's the goal of life.
Life is a, IMO, a natural construct that has a goal and that goal is simply to survive no matter how or what is going on here on earth or even the universe.
Do I think life exists elsewhere? Sure. Why would I think only earth, out of billions of planets, billions of galaxy's is the only place life could or would arise. It's all about life surviving.