Obviously, I missed the point that your main objective was to explain why big glass helps with the reduction of noise in wildlife images, and I have read some of your points out of context. I should read it all again. Perhaps it doesn't help that we read several threads over several days, and the original context gets lost as the days go by.
I agree, it's certainly been an awful lot of writing to explain why using a faster, longer lens, shooting at a low ISO, and avoiding cropping your images, will lower any noise in your wildlife images. Use the full image from 600/f4 instead of a crop of an image from a 500/f4 and the result will have less noise for a given print size. Have I got your point now?
To put things into context, I have recently been trying to explain to a friend, why buying a fast, f2.8 telephoto lens and shooting at f8, will not give him faster shutter speeds than a slower lens shot at f8.
Sorry to waste your time, and I understand your annoyance at my post. If I still misunderstand your point, just say so, and we will move on. Don't try to explain further. If I could I'd delete my questions and buy you a pint