I confess, I don’t trust doctors. As for cancer... I have the sinking feeling that once you’ve got it, you’ve got it. Treatment may beat it back for a little while (at a very high cost, both financial and physical) but it’s coming back, probably soon, and this time it will get you. JMHO.
There are some aggressive cancers that are almost pointless to try to treat, but most cancers, if caught really EARLY, are very treatable, and may never recur. I think they’re finding that genetics play a big part. Some people are at high risk for cancer, even if they do everything right, because they have a sort of cancer “gene” dominant in their makeup.