You both use the word "cancer" in very general terms. There are many forms of cancer, each of which develop and spread at different rates. To simplify it down to whether or not you seek treatment just ignores the many factors that come into play. He has said that he's had explorative and preventative treatment. He's also been the usual droll Morrissey about it all. The leap, in some quarters, that he staring down the barrel of a gun is... jumping it!