WebWalkEvent doesn't have that option because it involves many things not related to just positions (e.g. opening doors, using charter boats, etc). You can use a WalkingEvent, however. WalkingEvent has the getPath() method that will return a List<Position> that you can use.
Also, you can click on a tile by using:
mouse.click(new MiniMapTileDestination(getBot(), Position x))
or
mouse.click(new MainScreenTileDestination(getBot(), Position x))
Though I can tell you that this will undoubtedly not have an effect on banrates, it's still good to know this stuff if you want to use the OSBot API