No one eats salads anymore...
Without fiber to move everything along, shit gets backed up and you get cancer.
https://health.clevelandclinic.org/fiber-and-colon-cancer
I blame 90s all you can eat buffets where kids were encouraged "not to fill up on salads" like that was a bad thing when it was a cost effectiveness thing. Salad was/is cheap, but it's something we need to eat fairly regularly.