You can lead a horse to water but you cannot make it swim. This person you're imagining, if indeed they are so limited, will end up being frustrated with starsector no matter what you do. It's not the simplest game, you know? Your concern for this hypothetical person seems fastidious.
I don't see the person that benefits from this the same way that you do. To me, it's a normal person that thinks "bah, I don't want to do a tutorial, I'll just figure it out". I can see myself being that person. And I'd be momentarily annoyed at not being able to skip the tutorial, but would then do it and have a better experience for it overall. Or I'd skip it (via the save/start again method) but then I'd be mentally primed for things going bad due to a lack of understanding.
Given how easy it is to work around, the change where it'll remember that you did it across installs, and just the general nature of the tutorial... frankly, I don't think I'm the one being overly, as you say, "fastidious"