I've *never* felt that way about basically any homebrewer I've ever met. As a general rule, a homebrewer will tell you [or show you] basically everything they do, often without being asked!
I think, really, that you're putting too much stock into the idea of "secrets". Brewing is a matter of process. You want your process to be technically sound and repeatable. From there, you start looking at places you can improve each step, whether it's brew-day processes (boil vigor, cooling process, etc), yeast processes (cell count, oxygenation, pitch temp, ferment temp), aging / package day processes (racking technique to minimize oxidation, cold crash, fining, etc). Each small improvement might not be noticeable by themselves in the final product, but in the aggregate, you make *MUCH* better beer.
..............
This isn't magic. There are no secrets.
Agreed! No magic bullets, perhaps though a bunch of pretty good BB's. I tend to think that very good beer is the result of a whole bunch of things all being done well. Some things are more important than others, and are not secret, like sanitation, pitching rate, oxygenation, temp. control etc. I find it is often other little simple things, nothing specific though, that can put a beer over the top quality wise. Things like how you transfer you beer, how you stir it (when appropriate), how you chill it. This is the "Art" to brewing. I think it is tough to explain, and probably varies for everyone's set up.
I have a philosophy of brewing smoothly. I guess sort of Zen like. I like all of my processes to be smooth. Ultimately, this means that over the years I have figured out the simplest, easiest way for me to brew on my system. Nothing is forced. A person who was into the whole Zen thing (which I'm not) might say I take steps to not "bruise" or "injure" my wort/beer. I simply like a clean, fluidic, minimimalistic process to brew by. I'm very comfortable with every step, so this helps to cut down on little mistakes - which ultimately might be the deciding factor. It is not what you do right, it is what you didn't do wrong.
It is the whole process. I tend to think that a good beer is at most 50% due to the recipe, and that the process can in fact be more important.
I'll go with a music analogy. I got back into playing the tuba after many years of not playing. At the time I had inexpensive little horn, and occasionally I could make it sound really good. I had to work at it, and often it just sounded OK (the occasional great beer, many just OK beers). One time I had a real pro play the horn (ie., the same recipe I've been using....) and the difference was amazing. He quickly figured out the process that would make that horn sound amazing and proceeded to take that horn for the ride of it's life. Again, same recipe (horn), different process, much better result
As far as how you've described your process, nothing really jumps out at me, except maybe 40 min. to cool. I like to aim for 15 min. for this step. A lot of folks these days though are doing whirlpool hopping with great results. This often would also be a slow cooling, but perhaps there are some ways to do this that are better than others.