@silverwizard @linuxfiend No doubt that's part of it. I'm sure another is I don't know half of what most think I do. What I do know I'm fully confident in, but it tends to take a lot for some things to fully stick.
Ultimately, I seem more knowledgeable than I am because I have phenomenal troubleshooting and problem-solving skills, which tends to hide my weaknesses.
I've learned to use my gifts to hide my liabilities. Were the this 80's, I'd be the guy with a bookshelf full of tech manuals.