The key thing is to to build incrementally on past learning - while still questioning.
That, essentially, is science as I understand it. There is no big S science. There is no official leader in science. There is simply measurement, observation, hypothesis, rechecking and refinement in relation to the physical world. (And debate hopefully).
What else are we to do? Should we stop testing medicines? Should we go back to firewood for heating?
Having said that. Science is about the physical world. It is not much help in determining how to best live life - or decide questions of ethics and/or morality. These are basically outside of scope. For that we have philosophy and religion.
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