Seems like this is more for the hobbyists - building webpages for the love of the act. Frameworks are built to be standardized, enforce best practices via their design, and allow developers to 'hit the ground running', so to speak.

No web site is intrinsically valuable - the information and functionality it wraps is what holds its value. Developing the access to that information and function, enforcing correctness, and the timeliness of that development is what frameworks empower orgs to deliver at much lower cost in the present and future, vs. vanilla web dev.