On Linux: the “Import” dialog has a “Location” text box, where one can input a path, rather than clicking one’s way to the media file.
However, once that path is typed, there is no way to validate it; the file explorer displayed does not get updated to this path, and there is no ‘Select’ button available.
So clicking one’s way is the only option: one cannot directly access a file through its path (which could be convenient if one already has this path in the clipboard, for instance)