i have to say yes, but only because saying otherwise is a gross generalization, and there could be anyone anywhere within some body that needs meat.
that being said, i do not think that most people need meat. i think that most americans--living a sedentary american lifestyle--would be much, much, much healthier on vegan or vegetarian diets. in fact, i think that they would be healthier being vegan overall.
but, i do think that active people might be different, and certain bodies might be different.
if i didn't truly believe that my body needed outside cholesterol in order to be happy, i'd be vegan again. i eat vegan about 3-4 days a week (so does baby), and then vegetarian the other days (eggs, cheese, yogurt). i don't eat junk food.
similarly, my husband considers himself a "hard gainer" body builder, and as such, believes that he needs meat. if he didn't believe that, he likely would be vegetarian just because of my pressures. LOL but, he truly does not believe that he would be successful at gaining or maintaining muscle as a vegetarian or vegan. part of it is that he doesn't want to use meat analogues or protein powders (the cornerstone of vegan body builder diets), and the other part of it is that he sees vegan body builders as being "genetically gifted" or "a different body type" than his--one that can handle just about any diet and still build muscle.
personally, i think he would be fine on a vegetarian or vegan diet, but he thinks that he would atrophy to a skinny bone (and he is naturally ectomorphic) even with heavy lifting as he does now. and even if he didn't, he feels he would be more prone to injury or whatever.
and honestly, he sees omnivorism as the "optimal diet" because it is "the most diverse" while vegetarianism and veganism are removing perfectly good nutritional sources. the ethical concerns that vegans and vegetarians have do not concern him, as he believes it is not wrong to kill animals for food or to raise them for food, so long as it is done within specific ideologies and practices (animal welfare argument).
i think it is unfair to say that anyone who is not vegetarian or vegan is unthoughtful, or just lazy or what have you. my husband is very diligent about diet and nearly all of his life choices, and so when he does decide something, it is well thought. . .even if i disagree with various premises and so on.
and again, i truly think he would be fine on a vegan or vegetarian diet, but what i think doesn't really matter. and, he has gone on short 'stints' of vegetarianism such as when we do a retreat or when we travel and i'm in charge of food. he's not adverse to being vegetarian for a number of days or even weeks, so long as he's not working out during that time (eg, vacation), but he feels that when he is lifting, he needs meat at least once a day to get the most nutrients and recover.
i love him, but he's a weirdo.