If I was at any moment perfectly aware of every minute detail of every programming related topic, and could also apply it perfectly, I honestly think I'd get incredibly stressed and depressed. Stressed from all the billions of projects that I could improve, and would kinda feel the obligation to improve. And depressed because the whole reason I like programming is the learning part. Almost every project I start will end at the point where I learnt the most significant new stuff and it comes down to doing things that I know how to do. It'd ruin my primary hobby (and job) for me, which probably wouldn't result in me being very happy.