Earlier quoted context omitted.
This is a fascinating comment that really made me think. And I'd like to present you with a different perspective. You write that "My autistic perspective is that there is only a system of the world". But it's important to realize that the "system of the world" you've developed is from your perspective exclusively. You are modeling everybody in your system, and you may be doing your best to be 100% objective and not…
This reminds me of a quote from somewhere: All models are useful, none are correct. I (not OP) make a strong effort to be objective in my modeling of the world (even when it hurts), as it’s the only tool I have to understand and predict behavior and behavioral expectations. I wish we had access to predefined objective mental models, or could share them with each other (copy program structure and state across minds).
Honestly, I'd say literature and fictional works generally come the closest to that. Sitting down with a novel written by someone from a vastly different background from yours is kind of the closest you can get to seeing the world through someone else's eyes.
Obviously not spy thrillers and the like, but novels that are more about real life.
Another really interesting resource is some of the podcasts that do ~hour-long interviews with famous people and really dig into their childhood, motivations, etc. Dax Shephard is particularly good at this. Discovering how vastly different people's backgrounds are, the big choices they made in life, and the unexpected factors that contributed to those choices.