For what reason is Singer's principle less uncontroversial than it might otherwise seem?

Question

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Singer's principle faces controversy because it does not consider the proximity of the person in need to the potential helper, nor does it differentiate between situations where there is a single helper available versus multiple potential helpers. This broad application without distinction raises practical and ethical questions about the obligations and responsibilities of individuals in various scenarios.

For What Reason Is Singer's Principle Less Uncontroversial Than It