seeing as how veganism is not the default choice in most of the industrialized world, this is a misleading frame. it's also incorrect that it's more efficient to "eat animals" to produce muscle if we're being pedantic (as a vegetarian, however, this is not a meaningless distinction to me)— amino acids in dairy & eggs have a measurably higher bioavailability than those in meat, whether ranked by the PDCAAS or DIAAS https://web.archive.org/web/20151010170125/http://www.idf-is....

I assume they mean efficiency as in land area used etc. You have to put quite a lot of calories into a cow to get one calorie out.

Will you elaborate on the obvious reasons? Pretend they aren't obvious to me.

I'm interested in reading more about athletic advantages gained from consuming meat. Is there a reason that other sources of protein aren't giving the same benefit?