Has anyone ever notice Cancer is always distructive and overbearing?

This would apply especially to Cancer rising like president Bush and Mercury Cancer. Wide spread chaos, destruction, obstruction, and absolute control seem to be the mainstays of Cancer characteristics. Cancer never seems to be able to put their cancerous finger on what needs to be done but instead flows ahead with subversion and undercutting of foundation others have laid. Cancers cling to whatever they first chose and never seem to accept they can ever, ever be wrong. They seem like the just pubescent child believing this fresh onset of puberty gives them the right, knowledge, and wisdom owned by an experienced adult. They then blunder ahead creating quagmire and suffering with their endless bad decisions.