It's because during a normal diet, you wouldn't encounter sufficient amounts of nuts to equate to that amount of nut oil, causing imbalance in your body as you'

It's because during a normal diet, you wouldn't encounter sufficient amounts of nuts to equate to that amount of nut oil, causing imbalance in your body as you're essentially concentrating the value of a lot of a specific nut. It helps to think about it in comparison to animal fats. Caveman-you had plenty of access to animal fats, and though vegetables were common, it was not likely that they'd be consumed in such high amounts to equal that level of plant fats. One your body is used to, made for, and expecting to encounter and process, one it is not. This isn't saying one side is better than the other (though I suspect it's more correct to consume animal fat in quantity than plant fat), it just means that maybe you can run your car on cooking oil, maybe it works, but maybe your engine's longevity goes up or down as a result.