Should a web-app page title appear on every page, even with the current page highlighted in navigation?

I'm facing a dilemma with other designers within our team about whether the main page frame of our web app should iterate the title of the page itself at the top left corner or if it should not exist... since the page title is already highlighted in the left hand navigation.

For example, if we imagine a web app or website with a left hand navigation with several items labelled Home, Plans, Reports, About, etc, then should the main page frame then display the page title as well which could effectively repeat the the text from the label in the navigation?

I can think of a potential use case where people using screen readers would need to hear the page name, and perhaps also provide focus away from the navigation itself. Are there any reasons for or against this?