For life to exist, it is necessary for life to survive. Is that not a fact?
Yes, but you have not demonstrated why it is logically necessary to
want life to exist in the first place.
And you cannot do that because you cannot arrive at a moral principle from a simple statement of fact; for life to be a moral principle, you must first conclude that life is
a good thing; and that is a moral judgement, which cannot be derived from description and claims to facticity.
EDIT: Of course, as Mikkel has already pointed out, starting at "survival of life" is somewhat of a no-starter to begin with, because both of these terms are so broad in scope that they are largely impractical to be point of near-uselessness as far as moral principles are concerned; but this is still one step removed from your fundamental conundrum known as the Is-Ought Dichotomy, which you cannot get out of simply by adding more "science".