Not all. Pre industrial humans where I live ate a lot of slow roasted cactus. After 2 days buried with hot stones the cactus hearts were caramelized. I’ve tasted it prepared in the traditional manner and it’s just syrup in a leaf. Delicious, and I have no doubt it was great energy for people that had to walk miles every day.

Anyone that lived past 30 had their teeth rot right out of their head, according to the archiological record.