Why is Presentation responsibility important in Laravel applications, and what problem does it solve for developers?

Why is Presentation responsibility important in Laravel applications, and what problem does it solve for developers? The key reason to understand presentation responsibility is that Laravel applications are usually composed of several layers that must work together predictably. Views should focus on rendering data and UI rather than performing complex database or business operations. Ignoring that boundary can lead to duplicated logic, poor security, unnecessary database work, or code that is difficult to test. Why it matters in practice: Laravel views separate presentation from request-handling and database logic, with Blade providing the framework's templating features. The specific focus here is presentation responsibility: Views should focus on rendering data and UI rather than performing complex database or business operations. This question is designed to test not only terminology, but also how the concept fits into Laravel's request, application, database, security, or deployment workflow.