I will go to my grave telling everyone that the difference between understanding such texts and not is patience. I see a wall of text and it blinds me like everyone else. But I tell myself to just stare at it, if not understand it just yet. I will reread it or read another text trying to say the same thing. Soon, I start to understand.
Technical docs cannot be skimmed and so take a lot of time. But, it's the ones who take the time to read out who are able to do things like answer SO questions and design solutions for whole teams at work. It's totally worth it.