They have established that there was nothing rational or even vaguely logical about Oswald's outrage and jealousy.

"It's less that I can't and more that we both choose that I not be. Ed would probably quite happily follow Oswald around all day with a lack of anything else in his life, which was another hilarious piece of the hypocrisy of that day, but I digress. Oswald has things to do, people to see, and I would go mind numbingly bored and start taking drugs recreationally to try and alleviate the incessant screaming of my own mind. And really, if the city didn't want things like this to happen, they shouldn't orchestrate it to, should they?"