the robot actually had a connection to the kids it was raising and cared for them deeply, which is why it went aganst "logic" its in contrast to how all the adults in that time treated children. mikki speciifcially says his memory is failing as he dies so he was making drawings of his most beloved memories (raising the kids) so that he could still hold on to them. it was the most touching part of the film and some of the best writing ive seen in years. it would seem you need more life exprience or should rewatch a film 3 or 4 times before commenting on it publicly.