This range is not regulated by insulin. Even if insulin could raise the blood pH, it would have no effect on any cancer. Blood oxygen saturation is not regulated by insulin. Nor are tumors anaerobic. The theory that tumor cells thrive when oxygen-deprived was discredited more than 50 years ago.
Growth requires both nutrients and oxygen.
Solid tumors require more because they grow faster than the corresponding normal cells. Most chemical waste products are excreted by the liver and kidneys. Hypoglycemic episodes, which occur most often in diabetics who take insulin, are usually followed by several hours of depressed functioning. Many factors can influence how energetic people feel. But if the hope proves false, the good feeling will quickly disappear.