What does allow scientist to make moral and ethical judgements?

What does allow scientist to make moral and ethical judgements?

What does allow scientist to make moral and ethical judgements? I always thought that science is purely neutral and objective(yes I know this is an illusion, even if we destroy all bias and all string pullers(government, private/commercial sector) still even scientists unconsciousness can make the objectivity of his work biased without him even being aware of it), yet I see scientists making moral and ethical(which seem purely subjective to me[based on belief or opinion]) judgements nearly everywhere...

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