Bumpyroad,
I did read a university of Texas, official report about Pulque. The liquid (as does Agua Miel) contains surprising amounts of vitamins and minerals. Not some miracle hippie endorsed hoo-hah. The concentration of nutiriuents will not make the Guiness Book of World's Records per milliliter consumed. But it was and is assumed that a pint to a quart (liter) would be consumed daily.
Drinking a quart of pulque can be compared to swallowing a mild vitamin and mineral pill. For poor rural people that cannot consume a wide spectrum of healthy foods, pulque and agua miel is akin to a miracle.
Campesinos and rancheros with little income try and scrape by with next to nothing. I once stayed in the mountains of Oaxaca. Way rural. When shriveled tomatoes arrived at the tiny tienda it caused a commotion. The store was in reality a gathering place twice a week for regional bartering. Few people had money.
PS: Ant eggs made excellent bait to catch white bass. The people were astonished the fish were edible.They ended up cooking whole cleaned bass in a giant clay wok cooked to the point where meat, bones and all could be snapped into chunks like potato chips.
Just the finding of good young sweet pulque can be challenging. Most tourists are pawned "expired" sour pulque diluted with well water. Of course they didn't like it -- it's like comparing chicken roasted over glowing hardwood coals to Kentucky Fried Chicken, or Spam.