When to use the Blazor Auto Interactivity Template?

I'm reading through the docs and resources and still don't understand when the *.Client project should be used, which comes with the template from blazor -int Auto Example.

So the Client project is a pure WebAssembly project, which, as I understood, is not the handy choice to read and write data securely from the backend. (It's possible, yes, but easier to protect when just choosing server projects for this task)

As I understood so far, the Client project seems to be the place to develop more or less static front pages "landing pages" instead of an interactive web app.