Many environmental advocates support the elimination of regulations on activities deemed 'non-harmful,' which typically include practices like camping, hiking, and fishing. However, it is debatable whether fishing can truly be classified as a non-harmful activity. Beyond the ecological impact on fish populations, the practice can lead to significant distress for local communities that rely on these resources for their livelihood. For instance, those who depend on fishing for their income – local fishermen, their families, and the businesses that serve them – certainly experience hardship as they witness the depletion of fish stocks. In this context, fishing can hardly be considered a non-harmful activity.

Which of the following, if true, most seriously weakens the argument above?