I remember when I was writing annual reports which included explanations of the company's technology to the readers. It was some of the best advice I was ever given. It gave me permission not to appear as if I knew what they were talking about, in fact, it was better that I didn't because it forced them to explain it in simpler terms. I noticed as I was with the company longer and began to understand more that I sometimes slipped into a buzzword bingo player's dream. I had to really explain the technology.
Technical writing is even tougher.
That's one of the reasons I like consulting so much is that I'm always learning new products. So, I keep my writing at the appropriate level. I think technical writing is the easiest form of writing because the manual is already written. It's just in a number of different heads. My job is to pull out the important information and put it in a medium that I think the user will find useful.