The meme is questionable, no argument (aren't most?)
But point 3 is just straight up wrong.
- There's vegan body builders, including some that have literally never eaten a single piece of meat.
- There's also a SIGNIFICANT difference between "enough protein to be healthy" and "enough protein for my entirely optional hobby".
- 90% of the (wannabe) body builders I know still supplement with artificial proteins (powders, shakes, bars, etc.). You could do the same with vegan sources
- Most people also forgo taste pleasure anyway, eating just rice and chicken, or plain greek joghurt. At that point, might as well eat a block of Tofu