Why you don't share your Knowledge?

I think some people are just not so inclined to be teachers as others are, some are more generous, some have more experience than others, some might understand coding but not have a great ability to step back and see a bigger picture so that they can teach it well, some just don't have the time, some are selfish and focussed on their own projects to the point where they don't want to spend time doing something `for free` or non-project-related, there's all kinds of reasons. I Don't think anyone has any entitlement to be taught by people, just because they might know about a subject. There is as little gratitude in that as there is generosity in the people who don't share it. Also you'll find most people learn by teaching themselves, experimenting, taking the time to learn and make mistakes, taking more and more information in, talking to others, etc. You can't have things handed to you on a silver platter, there'd be no value in you accumulating it. And even when some people do share or teach or tutor stuff there are different degrees of how much effort they put into it - some will share just some program code and expect you to make your way with it, others will explain the subject and give a good summary, etc. You sound like you're angry about or frustrated with or jealous or other people having knowledge that you don't yet have. It's valuable information and people's time is valuable so you aren't likely to find a whole lot of us suddenly turning into blitz-schoolteachers. I think at the root of all this you need to have more patience with yourself and your own learning process, knowing that it is taking time and that you need to put in efforts yourself to educate yourself.