Same as eggs, butter, meat, etc, etc. The only constant seems to be that refined carbs are basically prepackaged obesity if you’re lucky or diabetes if you aren’t.
It just seems like the evidence is back and forth when one tweet summarizes a mendelian randomization study on LDL cholesterol and CVD outcomes, and then the next tweet is a guy with one million followers explaining how butter cures cancer. But it shouldn't be very confusing once you filter out the latter in favor of the former.
You jest, but there's some small (<10%) cohort of cancers for whom minimizing available glucose will significantly slow their growth (obviously not stop or reverse), allowing more time for other treatments. Tumors in general tend to be highly glycolytic, and making the body's fuel mix oriented toward fatty acids and ketone bodies may help in these cases.