He just wants to be able to fly around infinitely and blow up ships and waaaay back when Starsector's campaign mode just began to bud, that is exactly what you could do. But man, that was a long time ago and Starsector was never planned to be an "arcade" shoot'em up.
Combat Readiness exists for several reasons and a major one is to prevent some super fast/agile frigate from kiting entire enemy fleets to death over hours of game timeāno lie, it used to happen and I'm sure there's a Youtube vid out there of one guy soloing an entire Hegemony Defense Fleet in his single Tempest frigate! As mentioned it also exists to bring a bit more strategy to ship deployment.
In the end though, different strokes for different folks. Starsector is intended to be a more strategic game with some deeper sim elements, not a twitch arcade shmup. Also, every patch alwaaaays brings a few folks out of the woodwork who complain about CR, lol