He went with the choices that deepened character arcs rather than Wookiepedia pages.
Who’s to say that alternate choices wouldn’t have deepened character arcs? If anything, Rian’s overly simplistic choices made the characters seem much more flat than they could have been. Most of TLJ’s character development is just “they did it in the first movie, they do it in this movie”. Rey tries to find an identity for herself, Finn joins the Resistance, and Kylo tries to avoid being good. There’s no new dimensions added to any of the characters, when alternate choices could have made character development much richer.
I agree with Ed that this is the wrong place for this discussion though.