The user interface often contains a lot of cluttered code primarily because of the complicated logic it needs to handle. The presentation patterns are design primarily with one objective in mind, ...

If you say "In the MVC pattern where does business logic lie" and imply that everything must be labelled as a model, view or controller, then of course people are going to label the service and data ...

The Model is unaware of both the View and the Controller. The Controller is the heart of the MVC framework orchestrating the flow. The View is aware of how to present the Model.