Most nuts and seeds are also almost 100% fat, plus many fruits and vegetables contain some fat.
You mention 80-120g of protein a day, that is probably more like 50g. Most people overeat on protein, which leads to all sort of issues like kidney problems, etc.
On the other hand, most people don't eat enough fiber, which leads to all sorts of digestive issues that are consider normal but are not.
For example, getting diarrhea or constipation every other month, carrying around anti-diarrhea pills, etc.
This is not normal and does not happen while eating enough whole plant foods, but it's socially considered normal because its so prevalent.
Most people get 15g or less of fiber per day, while they should be getting 30 to 50, that is one the main problem with the western diet, and not the lack of protein.