A series of experiments in the 1950s aimed to understand the nature of the mother-infant bond. In these studies, newborn monkeys were separated from their biological mothers and raised in isolation. They were presented with two surrogate mothers: one made of wire that provided milk, and another made of soft cloth that did not. The infant monkeys consistently preferred to cling to the soft cloth mother for comfort, only going to the wire mother for food. This research provided strong evidence that comfort and security are critical components of attachment, not just nourishment.

Based on this description, construct an argument evaluating whether the scientific insights gained from this experiment justify the methods used. Your evaluation should consider the ethical implications for the animal subjects and why this research might be judged differently by today's standards.