Was the value judgement that caused you to describe these things as "harm" based on scientific principles?
Of course not, because values per se are not a part of science (except the axiom that knowlege itself is inherently good).
Every system of philosophy has its axioms. The fundamental axiom of religion (at least the Abrahamic ones) is that there exists an omniciscient and omnipotent god who must be obeyed at all costs, even if doing so causes humans to suffer horribly.
But does this omnipotent god simply tell everyone what he wants them to do? No. You have to find out indirectly from
other humans acting as self-appointed communication channels, often by "interpreting" documents written by long-dead humans that must be accepted as, uh, gospel.
One would think the extreme hazards of such practices would be obvious, but I guess not.
I'm a humanist, a philosophy (not a science) based on the axioms that human happiness is good and human suffering is bad. There's still plenty of room for debate here, particularly when trading off one human's interests against another or when considering other species that may share our self awareness. But at least we have the tools to further the debate by determining if our actions are consistent with those axioms.
That's a hell of a lot easier (and a lot more honest) than determining if our actions are consistent with the wishes of an imaginary diety.