As others have pointed out, the data shows that it clearly works well for most of the world. For cases where it doesn’t make sense (these are exceedingly rare)

As others have pointed out, the data shows that it clearly works well for most of the world. For cases where it doesn’t make sense (these are exceedingly rare), they should do what works best for them. If we were to ship the equivalent calories and nutrition in vegetable form we would be able to ship it earlier and more often than the meat, too. Plant based nutrition is more abundant, more efficient, and more secure in almost every region of the earth. The only case where meat makes rational sense is generally when you prefer the taste and/or calorie density. This doesn’t often make sense on a population scale. I don’t think it makes sense for individuals either, but that is still considered opinion these days.