[tracker1]

Legumes and soy in particular is a pretty common allergy... it's nearly impossible to get sufficient protein without meat if you have a legume allergy.

The impact of non-natural feeds on the overall nutrition profile for chickens and pork are larger than with ruminant animals. Chickens have been bred and changed a lot through environmental manipulation to grow much faster than in nature.

There are a few breeds of cows that are producing more muscle mass than most, they've gotten quite a bit larger through breeding as well, though the difference in time to maturation doesn't come close to what we've done with chickens... I'm not sure it's for the better though.

[throwaway-11-1]

Overall legume allergies affect 1-5% of the population, this is all legumes combined including peanuts etc. Soy allergies are 0.3 - 0.5%, not sure what you qualify as pretty common. For the record I have a fairly serious peanut allergy and abstain from meat and dairy with zero issues.

[tracker1]

FWIW, I have pretty bad reactions to most foods outside of eggs and ruminant meat... so whatever the limited number of the population; across billions, you're still talking about millions of people. And it's pretty bad when you're one of those people, and there's others literally want to outlaw your food supply.