I think you may need to see more movies.
Rogue One felt like a fan film, to me. It deliberately played on nostalgia from the beginning (Hey look! It's those cantina guys! Remember?!), and by the end of it they were just splicing bits of ANH in, even though it added nothing to the narrative itself, in either case. On top of that, which felt really condescending and weak, it was a pretty pointless movie, since the original "story", such as it is (lol), is completely self-contained, and everything else that happens we already had (arguably better) stories for.
Much like Rogue One, Solo is a story that doesn't need to be told; in this case, because a huge part of the appeal of Han Solo is the mystery of his shady past. Without that, I don't think he's a very interesting character at all; certainly not enough to warrant his own movie.
Entertainment works exactly because you don't fill in all the blanks for the reader/viewer/listener. If you start trying to answer all the questions, and take away the opportunity for them to use their imagination, the thing starts to fall apart, because, at the end of the day, it's just a trick.
"Magic", as Lucas likes to call it.