I'll happily concede the expensiveness point, and also say that if we are not entertaining the idea of forcing anyone to give up meat (which is what I thought we were discussing), then we are not in disagreement.
I'll only add that when promoting vegetarianism or veganism, I find most such sources to be akin to propaganda, i.e. they always talk about the benefits but rarely talk about the disadvantages. I suspect this might be because veganism is often tied to political preferences (and certain cultures).
As an example, here's something Wikipedia mentions that you will not usually see entirely discussed in articles promoting such diets:
> [Vegan diets tend to be lower in] omega-3 fatty acid, vitamin D, calcium, zinc, and vitamin B12. As a result of the elimination of all animal products, a poorly planned vegan diet can lead to nutritional deficiencies that counteract its beneficial effects and cause serious health issues, some of which can only be prevented with fortified foods or dietary supplements
This might partly explain why it's about as common to find a vegan bodybuilder as a flying cow... it might not be impossible to find one, but it's about as unnatural. And there are probably good reasons for this, including availability and easy absorption/digestibility of all the essential amino acids, which is important for muscle growth and maintenance, which in turn is very important for health especially in middle and old age.
It could also explain why when I see a random vegan person, they tend to "look" unhealthy more often than a random non-vegan person, although I concede that I may be biased, of course -- I've also seen sources claiming vegan people live longer, although I suspect that if it's true, it may be because vegans tend to be more health-conscious and choose their diet and sources of nutrition more carefully, not necessarily because of the lack of meat itself.
But of course, as long as all such information is reported in an unbiased and accurate fashion, I see nothing wrong with it.