SO SO much truth here.
There is no "one right way", or everyone woud be doing it (except that one guy, because there's always that one guy...) There are hundreds, thousands, of wrong ways.
I don't recommend the ways I use - they are simply inapplicable to most - but I'm happy to explain why I've chosen the ways that I have, the trade offs I understand myself to be making, and I post the results of my efforts as possibly useful anecdotes to others.
Yes, I big on *understanding* poultry nutrition. So that people can consider their needs from their chickens in their situation and make intelligent choices about how to feed, what to feed. The same with understanding our birds (in terms of reasonable expectations of needs and performance) so we have references against which to compare our own bird's condition and outputs. Again, so intelligent choices can be made - how many hens do you need? how much space? How many roosters (if any)? How often do you have to take for meat, or replace as they "age out"? Playing the averages.
Nor do I imagine things to be somehow set in stone. I'm improving my pasture (for lack of better term) as my understanding grows and weaknesses are identified in the way my chickens perform on it (or in the feed I buy for them). I'm improving my chickens too, selecting for those which do best on my lands, under my management conditions, based on my needs for eggs and meat, and the cratures they are in competiton with (ducks, rabbits, goats) or risk predation by (owls, hawks, eagles, trash panda).
Some here on BYC are of the belief "I'm doing it, everyone can (or should) do it" - while often ignoring the very personal circumstances that make their flock desirable or successful (however they define success). I'm of the belief that you probably shouldn't (or can't) do it the way I do, but there are the things we share in common you can and probably should consider as you mull it over for yourself. Intelligent choices, based on reasonable expectations.
If there is any article of faith for me, its that things are complicated, there are always trade-offs, and that physics (and biology) are uncaring. Others have their own beliefs, to which they cling with equal fervor.
/edit and I have internet back, but my spelling still sucks. I'm not fixing it.