@tomd You are not providing anything that can make the answer more enlightening, easier to understand, or correcting any supposedly false information. Two comments: 1) That radiation can increase the risk of cancer was known, yes, but that the mechanism was DNA/gene damage was not known, because we did not know DNA existed. 2) If Apple manages to prove his hypothesis, based on Warburg's hypothesis... congrats, Nobel Prize and huge fame for him. Ping me when that happens.

Apart from that there is nothing you wrote that I see any reason to bring into the answer. If you want to write your own answer based on your thoughts here, be my guest, and if it is an easily digestible answer that connects to OP's question, answering it better than I did, I will up-vote it.

"because we did not know DNA existed" OH COME ON!! DNA was first isolated by [Miescher] in 1869. The renowned Avery experiment showing that DNA is the genetic material was published in 1944. Rosalind Franklin knew a lot about DNA long before Watson and Crick. Furthermore, it was well recognized that mutations in the gene is the cause of genetic variation long before the structure of DNA was known.

Beedle and Tatum (one gene, one enzyme) was published in 1941. (embryo.asu.edu/pages/…)