I agree with the sibling commenter that the parent poster was likely using the impersonal you. It is true that we don't know anything about you. You haven't volunteered any specifics, so we're kind of forced to guess if we want to try and respond in a productive manner.
To that end, I think that they chose a very good example. Abstractly, doubly linked lists are a special case of undirected graphs. So pointing out that a naive graph implementation is generally sup-optimal, and that usually one can more effectively model them using different data structures that Rust (and functional languages, and databases, and files, etc.) can handle just fine, neatly addresses problems that one might solve using a doubly linked list, as well as a whole host of other cases, in a single stroke.
To that end, I think that they chose a very good example. Abstractly, doubly linked lists are a special case of undirected graphs. So pointing out that a naive graph implementation is generally sup-optimal, and that usually one can more effectively model them using different data structures that Rust (and functional languages, and databases, and files, etc.) can handle just fine, neatly addresses problems that one might solve using a doubly linked list, as well as a whole host of other cases, in a single stroke.