Small arenas like EW or MW are different from the LW in this regard.
There are so few players in there (and often with relatively few sorties) that damage score points in fighter mode are much less important. You can very easily get a high rank by flying very few sorties, sometimes as little as one or two. This is not possible to such an extend in the LW arena.
Last tour, there only two guys with less fighter than attack sorties ended up in the fighter top 10. And even for those two it doesn't necessarily mean they did it to "protect" their fighter rank:
