We aren't talking about one. We are talking about five. A gang is a gang. ENY does very little to mitigate that.
You are talking about a gang of F4Fs that managed to jump you.
1) Most encounters do not start by getting jumped, so already you're cherry picking the setting to advantage your argument.
2) It is much harder, and takes more work, for F4Fs, of any number, to get into position to jump anybody. All the time those F4Fs spent getting into position that a P-51D, Spitfire Mk XVI or La-7 would not have spent is time those players were not fighting the outnumbered side, effectively reducing the numbers imbalance.
3) Escaping after being jumped by five F4Fs, or A6M2s or Hurricane Mk Is, is much easier than escaping from P-51Ds, Spitfire Mk XVIs or La-7s.