What objective measure do you have to back up your claim? If you were to take away the mass of the planet and its gravity, or for that matter the mass of the Sun and its energy, would life exist at all?
Moon, we must have some fundamental misunderstanding going on here. Perhaps it's due to the limitations of text based communication.
I'm not challenging the truth of what you're saying at all. What I'm saying is that you're making a fundamentally different assertion than what I and others here are discussing.
We say that life is ubiquitous on this planet, which is an observable truth that can't seriously be challenged. Life can be found in nearly every place you look on Earth. It has adapted to, exploited, and colonized nearly every environmental niche we've examined - including environments that one would think are far too extreme to harbor life.
Many people think that life may have done the same on other worlds. Scientists already know that some environmental niches on other planets are less extreme than some we find on Earth where life exists.