Also there are a lot more types of meat than beef.

https://en.wikipedia.org/wiki/Alpha-gal_syndrome

The alpha-gal molecule is found in all mammals except catarrhines (apes and Old World monkeys), the taxonomic branch that includes humans.

Sounds like you could still eat fish, human and chicken (and other bird) meat as usual.

Not, entirely correct. Alpha-gal syndrome is not a meat allergy. Gelatin, Glycerin and Magnesium stearate all contain high levels of it and are found in products as diverse as makeup, candy, shampoo, vape juice, energy drinks and toothpaste. High levels of alpha-gal are found in Milk and Milk products. All mammalian meat, organ meat, lipids and derived products. You check labels for the rest of your life if you have this and you'll probably still come into contact with it out in the wild. You get Fish, Eggs and poultry. That's only guaranteed if you buy the meat on its own, free from seasoning and cross-contamination. You don't eat in a restaurant anymore, unless it's sushi.

It works against dairy, too

Oh I think that a solid theory. Maybe why we are busy killing ourselves off. Maybe Gaia knows us humans are the major problem with all the shit going on and wired us to kill ourselves off.

Add in birdflu and man we could see a new era of man kind all being vegetarian. Btw I was working on a novel that contains birdflu and found a way to incorporate this into it.