Well, furious, that's true for many people. They will fly what gives them the greatest reward. But I think that people of an average skill level or above would fly the early war planes so they could familiarize themselves with the perk rides. I know I would. Mind you, I probably wouldn't hop in a C.202, as I hate that thing, but I'd definitely hop in a 109F or G2 (well.. they were my tour planes a few month ago).
Personally, I would love to be able to fly the perk planes we have at a lesser expense. At the moment, the only perk plane that is actually worth flying is the 262.. but those things are boring. Not wanting to flay someone alive when I lose a tempest or spit14 would be a nice change, and I'm sure many other people would agree.
Unfortunately, it seems that hitech as already rejected this idea, as he has already picked it apart. A shame if you ask me.