Every angler should learn how to remove the hook from a bass' gut by going through under the gill plates..it takes some practice to get the technique down correctly, but I can get the hook out and release the fish 85-90% of the time.
And as far as the hooks rusting, that may be the case in salt water but in fresh I don't think so..I have caught several very sick bass with a hook and leader coming out of thier throat..removing the hook and in my opinion saving the fishes life