Earlier quoted context omitted.
I often notice when I start writing on a particular topic, I learn more about my thoughts and opinions of it and realize my thoughts are wrong or not really novel. Halfway in I give up since I feel like, "oh, this actually isn't really adding anything new to the conversation". Then I leave with a new humbleness about my beliefs but also a sense of "when am I actually going to know enough to warrant writing about it?"…
That's awesome! If only most people would do that, I think the internet would be a much more entertaining and enlightening place. Here's the thing: write that. Go meta, just a little, and write about your journey. "I thought this, but then I found out that, and now my questions have evolved thus..." I think it was Orson Welles who, when somebody asked him if they could write his biography, said, "No, because it will…
There is also nothing wrong with serving good knowelage, even if you can find the information somewhere else. Maybe your source is 10 years old, what has happened since? Or maybe its hard to understand for laymen. Or maybe the other sources will fall off the web, great websites disappears in the thousands every day.
Maybe someone is looking for a tech, but there's little info out there, even if the i info is good, it can still be dismissed. Help spread the knowledge.
Then there's the noise to signal problem. Your blog will be a light beacon - for others to navigate around all the crap.