It is altogether possible to step into someone's shoes and, in an understanding manner, convey the problems they are having. This is to sell a product, not an agenda. Keep topics neutral whenever possible. A Balancing Act Good scenarios bring together many different elements to create a coherent vision within each story. Balance characters, settings situations, key themes, technologies, events, products, logic, emotion, aesthetics, behaviors, social trends to serve a specific purpose.
Specific purpose depends on the design problem, training discipline and role in development team.
Sketch scope of scenarios first, identifying key events and issues. Provide examples of good and bad affordances. Provide examples of good constraints. Opposite of affordances, limit possible actions that can be performed. Handle for scissors is good example.