I think part of the problem is that the properties that are required to be a successful politician aren't necessarily the same ones for being a caring, empathic human being. In fact some are mutually exclusive. Just look at Corbyn. He is clearly a caring, compassionate man, and that was part of what stopped him playing the political game to curry favour when he was the leader. He could have blanded out the message in order to get elected but he valued honesty over spin