https://www.comicbookmovie.com/sci-...homework-with-star-wars-the-last-jedi-a175076
Sam Witwer just did an interview laying out his thoughts on The Last Jedi. Like I kind of laid out recently for myself, Witwer probably does a better job of relaying my sentiment as well. For those who love The Last Jedi. Good on you. I'm glad you enjoy it.
I think it's an ironic argument - his position is that Rian Johnson didn't know Star Wars well enough and shouldn't have taken the risks he did. As an example he says that there was no good argument for why Luke wouldn't have gone to help Leia.
Ironically, this very argument shows his own lack of knowledge of Star Wars and the old EU/"Legacy" Cannon (or illustrates that his own personal take is highly subjective). It was common plotline in the early EU novels set in the approximate equivalent time of TLJ that Luke was off doing his own thing, living as a hermit. It was probably 50/50 if Luke was available to help the rest of main cast.
I think it's fine if that doesn't work for you, or for Sam Witver and there's always debate about the authority of the old EU. But Luke's decision to go off on is own is something that was clearly lifted from the old EU and therefore is firmly rooted in Star Wars. Luke's plot in TLJ was lifted from the Jedi Academy and Thrawn novel series. The argument that Luke's plot does not match Star Wars requires you to ignore large amounts of officially published Star Wars material. Luke's arc always had to include him becoming disillusioned and a hermit, coming around at the end and learning the error of his ways. In my view, Luke's character arc is the one thing the new trilogy did right.