Historically, they would not had that many vegetables available to eat daily either. Likewise, meat was quite expensive. In quite a lot of places, beans and such vegetable proteins were not available all that much on regular basis. Majority of contemporary diets, including keto, vegan, vegetarian were impossible or expensive. Raising bees for honey is not a new thing by any standard.

Another thing is that historically, malnutrition was a thing, not just something rare. The people would be getting serious diseases or be dying because of this or that missing in the food, there were whole epidemics of diseases that basically do not exist anymore.