When I installed Gentoo back in the very early 2000s I genuinely had no idea what I was doing. I printed out the entire install doc, then launched into the install with no working computer and just the paper doc.
I didn't know what I was doing but the install doc was good enough that I got a working installation!
I remember baffling some people on a forum asking for help with something dead simple and them not understanding how I had a working system without understanding that thing.
"But... you installed Gentoo from scratch, how do you not know this?"