Brewster was a "Hi-Tec" fighter at itīs own era...
Just like F/A 18 would be nowadays...
The value of that thing then...was not inconsequential
The question is about the doctrine:
The best scoring finnish fighter aces worship the Brewster...
Vice versa...US Navy thought, the Brewster was a weak and poor, and not suitable for US.Navy use for intercepting...
Things and needs are so different...