Pilot's point of view takes second (3rd? 4th?) seat behind the air force's or air service's point of view. They demand that aircraft does the required missions, and will agree to the expected losses the fighter force will sustain in order to these missions are completed. An supposedly indestructible fighter that can't reliably escort the bombers all the way to their target is a worse proposal than a realistic fighter (ie. the one that can be destroyed) that can do the escort. Same goes with an interceptor - air forces/services required something that can climb fast, fly fast and carry the bomber-killing guns. There was a lot of fighters that out-climb the P-47.
The IV-2200 was a bird at the roof. R-2800 was the one in the hand, and what a bird that was.