La5 is 30 ENY which is crazy. Mean effective ENY by your stats is around 12 iirc. It takes probably around 70-80 kills in La5 to get a 262, assuming you land some of them, and a large fraction of the players can do that in 1 tour or less.
Actually only a small (~20%) fraction of the players get so many (or more) kills in attack and fighter mode combined in a single tour. And that's with their favourite plane set and not in the La-5 - which is indeed absurdely overpowered for an ENY 30 plane, but still would probably increase the difficulty for many players to get their share of kills in.
The median kill/h for all players with at least 10 fighter sorties in tour 177 was 3.55 and their median total time in fighter+attack mode was about 13h. There are not that many fighter perks Joe Average will be able to earn in a tour with stats like that. Something 50 perks / tour is probably a good estimate of average perk gain per tour, 100 perks should set you significantly above average.
Back in the day, when I was making about fighter 1,000 perks per tour myself, I would have thought "200 perks for a 262, piece of cake", but that was before I was able to analyze the actual stats of all other pilots. Later I realized how much we old AH vets tend to overrate the capabilities and efforts of the average MA pilot.