Doesn't make sense to me that a 400lb obese person would need to consume the same amount of protein as a 400lb lean muscle bodybuilder.

All of the protein recommendations I've seen were for lean mass. You don't feed fat.

If you don’t forget to count proteins from all the grains and other products, then you may realise you don’t need that much meat (or any meat at all).

Nobody should be getting all of their protein from meat, though.

Even a cup of cooked rice or a slice of bread has several grams of protein.

People, even meat-eaters, tend to get much of their protein intake from the long tail of non-meat foods they consume. Lots of foods (especially grains and legumes) have a little bit of protein, and that adds up.

That's not really a lot of protein on a low carb diet like they are suggesting.

Nobody said you have to get all your protein from meat…

do you think that's a lot or a little? does that sound realistic or unrealistic?