because the zero is made of crap, very very simple answer. Unless theres a monster furball(alot of times zeros are killed first) zero aint no good, unless u get a sucker to turn fight u. The other day i was trackin a red on the radar, thought it was a set of high bombers, it ends up being a zero, i was in a 51b, i came in behind him so fast i almost didnt have time to line up a shot(i was striaght and level, no wep). In ewa it isnt bad, compared to f4f it is good, but with f4fs strong armour and solid 6 50s and its ability to dive imo makes f4f a more desirable fighter. BUt if u want a turn fighter hurrC out classes it big time, they have more armour better guns and for some reason turn better.
But of course since i am a hardcore USN guy(f6f all day long) i dont like anythin with the meatball logos on it.