I think it gives people a sense of satisfaction in modeling real world in the relations between classes. The assertion seems to be that if to solve a problem it has to be correctly modelled into the type system of the language. Once the modelling is done correctly solution will arise by itself.

On the other end people who prefer weakly typed languages see problems as primarily that of data transformation. For example from HTML Form to Http Request to SQL Db to CSV File and so on.

Both approaches are differentiated by the perspective on the problem.