Except they hijack scrolling (I think their intention is to “snap” to various sections). On my device, that puts the viewport at some point between sections, and I cannot manually scroll to correct it. So I can’t read the content either. Well done there.
What would be really cool is if web browsers offered a mode that forced a contrast minimum when viewing websites. This would benefit devs and users alike: Users would have a pushbutton way to make bad websites readable, and devs would have a push button to show what their site would look like to users who get annoyed enough to push that button.