That sentence doesn’t really make sense to me. You can try to hide things like bad navigation, bad information architecture, etc… But I’d argue you cannot hide an experience, since it describes how the user experiences your product. So in this case it might turn out they weren’t able to hide their bad UX to Marc.
If you somehow manage to hide your bad UX so well that it turns out the user actually has a good experience with your content, then well done!