Theoretically it makes sense so you can have that added storyline, but I feel like it was added just to make a connection if that makes sense? What
Swede and I are saying (well, what I'm saying at least) is that you could have taken all the Batman related content out, and it still would have been a decent movie and Phoenix would still have won the Oscar. It's not a great movie, and didn't deserve to be nominated for Best Picture. His performance really carries that flick.
Like I almost think the movie was originally written as an extremely f***ed up guy coming to terms with his own origins, and then some editor was like "Yo we can make this into a Joker origin story" and wrote around that.