"De-bulking" a tumor kicks the cancer back quite a bit - immediately. There is an emotional satisfaction from having a surgeon 'get rid of' a cancer tumor all at once versus that long wait to see the radiation results.
It was only when the surgeons had me on the table that they saw how bad my G7 was, it wasn't visible on the scans. Wife is fine with lack of sexual interest/ability, our relationship is vastly more than just sex.