The basic idea behind isolating domain entities from the presentation layer is that these two components are responsible for different tasks. The domain entity is responsible for handling data and logic related to a specific application or system, while the presentation layer handles user interaction with the system. By keeping these two elements separate, you can ensure that each component performs its intended function without interference from one another. This helps make the software more reliable and efficient. Additionally, separating out domain entities from the presentation layer allows you to make changes more easily without affecting other parts of the system. For example, if you need to add a new feature or change an existing one in the application, you can do so without having to alter anything in the presentation layer. This makes updating and maintaining your software much simpler and less time consuming. Moreover, having an isolated domain entity also allows for better scalability as well as improved security of your application or system. With a separate domain entity in place, it becomes easier to scale up or down based on demand, as well as protecting against potential cyber-attacks by keeping sensitive information away from malicious actors.