"TIL on several late 60's recordings, prominent jazz saxophonist Ornette Coleman used his 10-year-old son to play drums, though he could have employed high-profile adult jazz drummers. He prized the child's joyful child musical curiosity over a more technically skilled adult"
I'm sure it was observed that there was a wide range in the amount of time living rats would be found in water after something that would have caused them to fall in.
To establish what mechanism was causing the disparity it would be extremely easy to test a rats reactions to different scenarios without actually killing the rat, not to say they didn't anyway though.
The point is that information relating to potentially extending survival time in a disastrous situation is among the most valuable things to study. Can you not recognize why that would be important to understand?