Why can't cancer be cured by simply cutting out the tumor?
There is not one kind of cancer but many, you could say every case of cancer is as individual as the person suffering.
Many cancer typs can in early stage be cut out, depending on sice and lokalisation and staging.
Others need XRay and or specisl cancer medicin ( ex cytostatica) befor and or after surgery.
Finally if you should suffer from cancer, you should consult your licenced therapeut to find the best treatment for you and this statment is my only recommandation, l'm not liabil to what you do.