Serious question. What's wrong with simply having a static directory from which you send html files to the client? I do that all the time with my servers and th

Serious question. What's wrong with simply having a static directory from which you send html files to the client? I do that all the time with my servers and the load times and the complexity of the project never seems to get out of hand. When the app needs to be highly interactive, I perform simple fetch requests and DOM updates from JS. Am I missing something here?