I suppose that it's not meant to deal with errors normal to the use of the application (like not entering an email in an input) but rather to exceptions and Jav

I suppose that it's not meant to deal with errors normal to the use of the application (like not entering an email in an input) but rather to exceptions and JavaScript errors. I'm imagining stuff like receiving data of an unexpected format from the server, which might break your application in unexpected ways (i.e. put it in an undefined state that is hard to reason about and would make it better to just "show a generic error").