How to Design Screens Without Understanding the Real World Information

If we create software or any digital environment app, whatever. We need to figure out what our objects are and how our objects relate to each other. If we create software without understanding the real world information environment of our users, we will likely create software that does not align to the real world Information Environment of our users. This will hands down be more confusing and more complex and less intuitive software than if it did align. Okay. To get to these kind of meaty questions that I just outlined about doctors and patients and appointments, how do we get to, like, rubber hit the road? The magic here is if these questions bubble up collaboratively, then, and if many of these questions