The entire colon cancer thing is a myth. There are no studies that actually correctly identify "red meat eaters". Anyone who eats a beef burger BUT ALSO the fries, chicken nuggets and coke gets into the red meat eater cohort. Anyone who ears salami - highly processed food - ON A BREAD, with orange juice or granola for breakfast -> red meat eater.
There are no proper large scale studies that followed a large group of keto or carnivore eaters. All that "conventional wisdom" that people are parroting stems from 70 years of bogus science. It's all worthless epidemiological studies.
Humans are carnivores. Our digestive system is most similar to that of wolves. Our natural food is red meat - it's literally stated in the bible: Eat meat from animals that have hooves and graze, but not pigs. They knew something thousands of years ago.
What is far more likely is that red meat is our original food, and by adding carbs and seed oils, we throw a wrench into the system that makes things go haywire.
It will take decades for enough studies to come out (impossible to fund these, since big pharma has zero interest in a population of healthy carnivore eaters) to show this.