Don't get sore. Let's look at this once again.
I can see that you're trying to be encouraging, but your first post is vague. You write that a grower pay close attention and the rest will come. So I guess in this what you're saying is, spend time learning from your mistakes and you'll get it right eventually. True enough, but my point is that it shouldn't take that long. People don't need to go by trial and error. It used to be that way. Web info was all trial and error, as in "try this and maybe...". Truth be told, a lot of info is still like that because problems develop that people here don't understand. So you're right on this - learning from problems has its place. It is quicker to learn from those that have studied how to grow indoors. Frankly, it's not hard, but what you're trying to do is create conditions indoors that mimic mother nature. I get the idea that you're making it harder than it has to be because it is harder to learn from one's own mistakes than from those that have already compiled info to solve those problems. I've said in these forums before that it is easier to let nature do its thing rather than attempt to control a grow. And yes, all people had before modern science was hocus pocus. What else did they have? Nothing. Did they have medicine? No. Surgery? No. It took a long time for modern medicine to develop to the point where we have chemistry and surgery and physical therapy, etc. It has taken the human race a very long time to develop this stuff. Growing a plant isn't nearly so hard, which is why I said "don't make it harder than it has to be." Learn from others. Do your own reading. Let good help be your analyzing. Then you're on your way. You and I actually agree, but you encourage trial and error based learning and I say that's not necessary.