The book has been debated.

https://www.redpenreviews.org/reviews/the-china-study-the-mo...

If diet stopped cancer, then the patients who eat less would see noticeable effect. This has never happened, except for maybe Otto Warburg, but even that is disputable[1].

[1] https://physoc.onlinelibrary.wiley.com/doi/10.1113/JP278810

I appreciate the reply, I'll read through the links.