I don’t keep fish. But I don’t think a fish hooked in the mouth or under the jaw is going to determine harvest or release for someone who is looking for a meal of fish. I have never fished a tournament where the fish are examined at weigh in for hook placement either. Any CO would have to have eagle eyes to determine whether a fish was legally caught or not unless you snag it in the tail.
I don’t see this knowledge changing anything for most fisherman.