The post you linked to suggests a reason why not. Enter is used to auto-complete a link. If hitting enter or return invoked a link jump, as far as I can imagine, it would become impossible to edit the link. Or it could become much easier to accidentally jump to a new file while attempting to type a link name.
Using modifier keys indicates that you intend to perform some kind of an action. There is a reason you can’t map hotkeys to bare keystrokes without a modifier.