Yeah, that's the thing isn't it. Rian didn't even do that, he tossed it out. Lucas by making the effort at all ends up being a more serious writer.
Frankly doing the starkiller script instead of TFA and TLJ would have been far more interesting.
You've confused taking writing seriously for not taking a product seriously because you view it as childish.
Elitist is the word that comes to mind. "They're early drafts for a reason." Isn't an argument. Neither is most of the dreck being used to justify it. Just because you don't take a sci-fi seriously doesn't mean it isn't serious.
The intent of Starwars is to be taken seriously based on a suspension of disbelief. TLJ breaks that convention, you could say; IT SUBVERTS EXPECTATIONS. Your confusion on the word serious and gritty is also laughable.
I'm not saying starwars is gritty, I'm saying it is serious. It believes in what is in the story. SERIOUS, understand what the word means.
A complete joke. Literally spaceballs. Even some of the jokes are the same. Illegal parking, running out of fuel, better take that helmet off. Ohh, better watch out for that ship, wait no, It's an iron. "Hahah, oh look at how self aware it is! Gotta laugh and clap." The movie TLJ is closer to a comedic space film than actually being starwars. It's not supposed to have that element in it. That's why spaceballs was a parody film, it was poking fun at how serious it was about itself.