I mean, like, I'm confused too...
If you assume your assumptions are correct you're correct. That seems pretty tautological. Chickens are chickens. Good things are good.
This feels a little like saying "Well if you assume potatoes are peoples main diet and they need an acre for 10lbs, nobody could possibly get value from growing potatoes.". Er... Yes? But... What's the point in making that argument exactly?
So, ok. You're right under your parameters. Those parameters are wrong so you can't make any determinations based off of them. We don't live in that world. But you're right in this hypothetical world.
But then you DO try to make determinations based off of those. Your argument seems to be "Nobody raising chickens can ever make any sort of an undefined difference in anything and you're all delusional and my parameters prove it", and well... That that is just patently false. Cause it firstly ignores a lot of variables, your quantitative values are based on some really unrealistic parameters and you completely ignore all qualitative factors entirely. Which seems like a terrible way to determine a blanket discouraging and antagonistic statement like "people are delusional and will never make a difference".
And THEN you're not interested in hearing why those parameters are off, you're making weird arguments like "hatching out lots of chicks means you're a hatchery not ACTUALLY keeping chickens", you're ignoring qualitative value and ignoring things like food quality, education, individual value, building small efforts, changing mindsets, making lives better, and countless other benefits... So what's the goal here? Cause I'm also kind of getting the feeling of "I made this thread to be judgey"... So if that's not your goal you're not meeting what your goal IS and I have NO idea what the goal was.
I think nobody would have a problem with your arguments if you weren't using really unrealistic expectations to heck on a whole swath of the chicken keeping population. As a thought experiment it's fine. As a method for judging a whole community it's garbage. And it REALLY seems like you're just doing the latter...