I hope you're arguing in good faith, just that I'm not sure as it doesn't feel like it. Obviously you're wherever the intro leaves you lol, whatever info that may be.
I know you find much of the story important but as I used the movie example for on purpose much of a story can be boiled down into core essence and a person can get the gist of what's going on from that. From leaving the intro you then enter the book narrative (from the movie start), so if you skipped ARR you're heading into the dragonsong and so what is taught in the ARR skip would be what you need to get HW without going "I AM THE WARRIOR OF LIGHT!? LOL I THOUGHT I WAS A CARPENTER".
Much of the info you need is reiterated as you play the game and so the accelerated start would just need to cover very core bits of info to get you into the book, and let the reiteration introduce new bits like in a book new info is usually told in the way that "it's always been this way", many characters are done that way too (when introduced not everyone gets a trumpet intro in books).
Obviously the more you know the smoother everything is but there are many reasons why someone may prefer the "movie" (not sit and watch, using it metaphorically) intro over the much longer in-depth description of the world (and clearly many love the in-depth style as well, I /do not/ want to take that away or modify it away from them in the future). I have never argued that ARR has no importance in the lore, just that for many people getting the core info to "good enough" and getting them to where they wanted to go could mean a lot more people sticking around (some people don't like early mmo combat, perhaps especially now that action mmos are more popular and so getting them deeper is a huge benefit, some people started exclusively to play fresh content because they saw a trailer, others have played old content and would love to start up in the expansion but don't want to spend $30 + $15 a month + $50 to come back in, there are many reasons why I've come to this particular solution).
Not suggesting people will have every detail of the game underlock but I'm just suggesting with a few core pieces of info you could go from "entirely lost" to "oh I think I got it, and this guy here is my friend right? I should go help them because the start said Garlean is bad! (and then a later quest might change those values but they have a start at least)" and hopefully from there like one may play Witcher 3 because it's new shiny and fancy they'll go back and try witcher 1 because they're invested now (Try HW, loved it- goes back and plays ARR with new game+).