we take for granted the ease with which information flows now days.
I only started guitar this year and the first thing I did with my first guitar was clean the human slime off the fret board, oil it, then set it up to factory specs. I could imagine buying my first guitar even 20 years ago and just getting used to however it was setup and potentially not even thinking about cleaning the fret board.
I could imagine not even knowing what a truss rod is much less that you should be adjusting it occasionally.
This is the best time in history to have literally any hobby.