There are no people who do not get cancer. Every human being, every beast in the field, every bird on the wing - is subject to getting cancer.
It is a simple matter of DNA replication not being 100% accurate. Cellular replication requires DNA replication and at any point an error of replication can modify a gene (an oncogene) such that the new cell is cancerous.
It is a simple and inescapable fact of nature that mutations in some genes will cause cancer and that cellular reproduction itself causes mutation.
In your post #108 you said, “This Egyptian mummy had to wait a few thousand years for his diagnosis.”
A recent study by University of Manchester scientists has strongly suggested that ... cancer is a modern, man-made disease caused by environmental factors such as pollution and diet.
In the extensive study conducted at the University’s KNH Centre for Biomedical Egyptology, scientists examined hundreds of mummies and found ... no signs of cancer—except for one isolated case.
Professor Michael Zimmerman said: “In an ancient society lacking surgical intervention, evidence of cancer should remain in all cases.” Therefore, the virtual absence of tumors and malignancies in mummies must necessarily be interpreted as evidence that cancer was indeed rare in ancient times.