To paraphrase your argument using biological terms, human technology has reduced the importance of "natural selection" because it has reduced the importance of external natural forces on human survival and reproduction. However, technology has done nothing to reduce "sexual selection" or female mate preference or male-male mate competition.
I agree that sexual selection is just as strong in humans everywhere as it was a million years ago. But natural selection has weakened only in developed societies. In undeveloped societies mortality rates are still very high and probably influenced by genetic traits such as disease resistance and behavioral traits related to social dominance.
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