So many folks that have it say things like "I was super healthy! Did exercise, young, don't drink, etc." Then you dig deeper and realize the last vegetable meal they ate was a soggy brussel sprout their mom made them when they were 17 years old, and also eat cold cut turkey sandwiches every lunch because they're "healthy", and maybe have a tiny shred of lettuce in the sandwich. For breakfast, they eat pancakes or sugary foods, and dinner is just a piece of steak
The correlation to any of that stuff and cancer is basically meaningless in the scale of one persons life
"Guys, it's not the chemicals present in every packaged food you ever set your eyes on, or the pesticides every vegetable is grown in, it's just that you don't eat vegetables."
Are you serious? Do you really think thats the reason that this is happening -- that people don't just eat their veggies? Fiber is important but, um, that's a pretty hot take.
I suspect there are other factors at play.
Victim blaming cancer patients as cope so you can convince yourself "it won't happen to me" is a disgusting trend
You can quickly find historical availability & consumption data and I don't think it supports any trivially obvious hypotheses like these. You'll find headlines saying things like that we're at a low point in vegetable consumption going back to 1988, but I'm reading an NIH paper charting '70-'2010 and the patterns look stable, except for increases in total calories, in dairy, and in added dairy fats and oils.
Whatever's going on, it's probably going to end up being complicated and multifactorial.
(I do love me a crucifer, though).