No worries - you are right on all counts. I would consider wild grass seed as grains, though, when you consider wheat, oats, milo and the many others from which we have grown our own staples are nothing more than well... seeds. But I can accept your logic without splitting hairs.
So let us admit that human 'grain' is fed because it is available.
Chickens have very similar nutritional needs as humans, i.e carbohydrates, proteins, fats minerals, vitamins, micro nutrients**.... 16-20% protein, right? Some fats and minerals. Certain vitamins etc. - - AND carbohydrates to equal about 75% of their total intake.
SO, how do people propose to fuel their chickens without the carbohydrates provided by grains? This is the part that confounds me. As you note, chicken does not live by grass alone.
While were calling a shovel a scoop, this whole thing sounds like a foodists imposition upon chickens. Someone reads Rodale Press denouncing grains or we hate Monsanto, and so we want our chickens to follow suit.
Poor chickens.
** The micro nutrient factor is fascinating, by the way.
I totally agree with your overall points. And foodist fads are really dumb. People need to become educated on farm ecology, because they have become way to disconnected from reality recently.
But I'm NOT so sure whether wild grass seeds count as "grains" in my book. Maybe it's just "splitting hairs," like you say, but I think the nutritional profile is very different. Most annual grains are very different from their wild, mostly perennial counterparts. It's kind of like saying that feedlot beef is essentially "the same" as wild bison, but hopefully we all know that's not true--very different profile and physiological effects on the consumer. But anyway I suppose too that the point is moot for all practical purposes, because domestic grain is what we generally have readily available to feed chickens, and they've adapted quite well to it of course, since ages ago.
Perhaps I should have offered a little disclaimer here: I buy some commercial feed (grain and soy based, organic) for my flock to supplement feeding, but my personal goal is reduce the amount of expensive, fuel reliant, imported feed I use in favor of things I grow on my farm and farm byproducts firstly, or failing that other things locally available that make sense (eg, expired bread from groceries or fish scraps). I've already save a ton of money this way to BTW. I live in Hawaii, where hardly any grain is grown, now or in the past. Grain is not the traditional carbohydrate staple here--the earlier settlers preferred root crops, taro, and breadfruit for their starches. I have given workshops on the subject of feeding chickens homemade feed and encouraged people to look outside the regionally inappropriate "grain box" of American convention for more locally available carbs to feed their birds. So "grain-free chicken" means something totally different to me than it might to someone living where grain was locally prominent and available, or who misguidedly doesn't understand that chickens do need some carbs of some kind.
I realize that the Polynesian situation of grain-less farming is somewhat unusual in the world at large, but I want to stress that it's not weird or unique, and it fed a dense and healthy population in Hawaii for well over a millennium, and going back even earlier in other parts of Oceania. These people weren't some kind of jungle savages or nomads, but a densely populated, complex society with elaborately fastidious land-use regulations and a well developed system of agriculture. And the Inca thrived and built an empire on potatoes. Potatoes have been a significant staple in "Western cultures" ever since they were introduced to Europe, especially for people with small amounts of land. Grains are not the only source of carbohydrates in the world. However, if I lived somewhere where grain was locally grown, or I grew grain on my farm, I would definitely be feeding more grain to my chickens. But root crops and other starches (eg. winter squashes) can make great food for chickens, just like people, and are particularly useful for chicken keepers with smaller acreage wanting to feed small flocks more homegrown feed--especially those living in places where humid, tropical climates and unpredictable, year-round rainfall makes growing grain nearly impossible.
I guess maybe I'm just looking at this from a whole different perspective... But that's how we can learn from each other I suppose...